| ; RUN: llc -mtriple=armv8-none-linux-gnu -verify-machineinstrs < %s | FileCheck %s |
| ; RUN: llc -mtriple=thumbv8-none-linux-gnu -verify-machineinstrs < %s | FileCheck %s |
| |
| @var8 = global i8 0 |
| @var16 = global i16 0 |
| @var32 = global i32 0 |
| @var64 = global i64 0 |
| |
| define i8 @test_atomic_load_add_i8(i8 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_add_i8: |
| %old = atomicrmw add i8* @var8, i8 %offset seq_cst |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var8 |
| ; CHECK: movt r[[ADDR]], :upper16:var8 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldaexb r[[OLD:[0-9]+]], [r[[ADDR]]] |
| ; r0 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: add{{s?}} [[NEW:r[0-9]+]], r[[OLD]], r0 |
| ; CHECK-NEXT: stlexb [[STATUS:r[0-9]+]], [[NEW]], [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD]] |
| ret i8 %old |
| } |
| |
| define i16 @test_atomic_load_add_i16(i16 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_add_i16: |
| %old = atomicrmw add i16* @var16, i16 %offset acquire |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var16 |
| ; CHECK: movt r[[ADDR]], :upper16:var16 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldaexh r[[OLD:[0-9]+]], [r[[ADDR]]] |
| ; r0 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: add{{s?}} [[NEW:r[0-9]+]], r[[OLD]], r0 |
| ; CHECK-NEXT: strexh [[STATUS:r[0-9]+]], [[NEW]], [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD]] |
| ret i16 %old |
| } |
| |
| define i32 @test_atomic_load_add_i32(i32 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_add_i32: |
| %old = atomicrmw add i32* @var32, i32 %offset release |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var32 |
| ; CHECK: movt r[[ADDR]], :upper16:var32 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldrex r[[OLD:[0-9]+]], [r[[ADDR]]] |
| ; r0 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: add{{s?}} [[NEW:r[0-9]+]], r[[OLD]], r0 |
| ; CHECK-NEXT: stlex [[STATUS:r[0-9]+]], [[NEW]], [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD]] |
| ret i32 %old |
| } |
| |
| define i64 @test_atomic_load_add_i64(i64 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_add_i64: |
| %old = atomicrmw add i64* @var64, i64 %offset monotonic |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var64 |
| ; CHECK: movt r[[ADDR]], :upper16:var64 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldrexd r[[OLD1:[0-9]+]], r[[OLD2:[0-9]+]], [r[[ADDR]]] |
| ; r0, r1 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: adds [[NEW1:r[0-9]+]], r[[OLD1]], r0 |
| ; CHECK-NEXT: adc{{(\.w)?}} [[NEW2:r[0-9]+]], r[[OLD2]], r1 |
| ; CHECK-NEXT: strexd [[STATUS:r[0-9]+]], [[NEW1]], [[NEW2]], [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD1]] |
| ; CHECK-NEXT: mov r1, r[[OLD2]] |
| ret i64 %old |
| } |
| |
| define i8 @test_atomic_load_sub_i8(i8 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_sub_i8: |
| %old = atomicrmw sub i8* @var8, i8 %offset monotonic |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var8 |
| ; CHECK: movt r[[ADDR]], :upper16:var8 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldrexb r[[OLD:[0-9]+]], [r[[ADDR]]] |
| ; r0 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: sub{{s?}} [[NEW:r[0-9]+]], r[[OLD]], r0 |
| ; CHECK-NEXT: strexb [[STATUS:r[0-9]+]], [[NEW]], [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD]] |
| ret i8 %old |
| } |
| |
| define i16 @test_atomic_load_sub_i16(i16 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_sub_i16: |
| %old = atomicrmw sub i16* @var16, i16 %offset release |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var16 |
| ; CHECK: movt r[[ADDR]], :upper16:var16 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldrexh r[[OLD:[0-9]+]], [r[[ADDR]]] |
| ; r0 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: sub{{s?}} [[NEW:r[0-9]+]], r[[OLD]], r0 |
| ; CHECK-NEXT: stlexh [[STATUS:r[0-9]+]], [[NEW]], [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD]] |
| ret i16 %old |
| } |
| |
| define i32 @test_atomic_load_sub_i32(i32 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_sub_i32: |
| %old = atomicrmw sub i32* @var32, i32 %offset acquire |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var32 |
| ; CHECK: movt r[[ADDR]], :upper16:var32 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldaex r[[OLD:[0-9]+]], [r[[ADDR]]] |
| ; r0 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: sub{{s?}} [[NEW:r[0-9]+]], r[[OLD]], r0 |
| ; CHECK-NEXT: strex [[STATUS:r[0-9]+]], [[NEW]], [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD]] |
| ret i32 %old |
| } |
| |
| define i64 @test_atomic_load_sub_i64(i64 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_sub_i64: |
| %old = atomicrmw sub i64* @var64, i64 %offset seq_cst |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var64 |
| ; CHECK: movt r[[ADDR]], :upper16:var64 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldaexd r[[OLD1:[0-9]+]], r[[OLD2:[0-9]+]], [r[[ADDR]]] |
| ; r0, r1 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: subs [[NEW1:r[0-9]+]], r[[OLD1]], r0 |
| ; CHECK-NEXT: sbc{{(\.w)?}} [[NEW2:r[0-9]+]], r[[OLD2]], r1 |
| ; CHECK-NEXT: stlexd [[STATUS:r[0-9]+]], [[NEW1]], [[NEW2]], [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD1]] |
| ; CHECK-NEXT: mov r1, r[[OLD2]] |
| ret i64 %old |
| } |
| |
| define i8 @test_atomic_load_and_i8(i8 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_and_i8: |
| %old = atomicrmw and i8* @var8, i8 %offset release |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var8 |
| ; CHECK: movt r[[ADDR]], :upper16:var8 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldrexb r[[OLD:[0-9]+]], [r[[ADDR]]] |
| ; r0 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: and{{(\.w)?}} [[NEW:r[0-9]+]], r[[OLD]], r0 |
| ; CHECK-NEXT: stlexb [[STATUS:r[0-9]+]], [[NEW]], [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD]] |
| ret i8 %old |
| } |
| |
| define i16 @test_atomic_load_and_i16(i16 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_and_i16: |
| %old = atomicrmw and i16* @var16, i16 %offset monotonic |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var16 |
| ; CHECK: movt r[[ADDR]], :upper16:var16 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldrexh r[[OLD:[0-9]+]], [r[[ADDR]]] |
| ; r0 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: and{{(\.w)?}} [[NEW:r[0-9]+]], r[[OLD]], r0 |
| ; CHECK-NEXT: strexh [[STATUS:r[0-9]+]], [[NEW]], [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD]] |
| ret i16 %old |
| } |
| |
| define i32 @test_atomic_load_and_i32(i32 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_and_i32: |
| %old = atomicrmw and i32* @var32, i32 %offset seq_cst |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var32 |
| ; CHECK: movt r[[ADDR]], :upper16:var32 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldaex r[[OLD:[0-9]+]], [r[[ADDR]]] |
| ; r0 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: and{{(\.w)?}} [[NEW:r[0-9]+]], r[[OLD]], r0 |
| ; CHECK-NEXT: stlex [[STATUS:r[0-9]+]], [[NEW]], [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD]] |
| ret i32 %old |
| } |
| |
| define i64 @test_atomic_load_and_i64(i64 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_and_i64: |
| %old = atomicrmw and i64* @var64, i64 %offset acquire |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var64 |
| ; CHECK: movt r[[ADDR]], :upper16:var64 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldaexd r[[OLD1:[0-9]+]], r[[OLD2:[0-9]+]], [r[[ADDR]]] |
| ; r0, r1 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: and{{(\.w)?}} [[NEW1:r[0-9]+]], r[[OLD1]], r0 |
| ; CHECK-NEXT: and{{(\.w)?}} [[NEW2:r[0-9]+]], r[[OLD2]], r1 |
| ; CHECK-NEXT: strexd [[STATUS:r[0-9]+]], [[NEW1]], [[NEW2]], [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD1]] |
| ; CHECK-NEXT: mov r1, r[[OLD2]] |
| ret i64 %old |
| } |
| |
| define i8 @test_atomic_load_or_i8(i8 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_or_i8: |
| %old = atomicrmw or i8* @var8, i8 %offset seq_cst |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var8 |
| ; CHECK: movt r[[ADDR]], :upper16:var8 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldaexb r[[OLD:[0-9]+]], [r[[ADDR]]] |
| ; r0 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: orr{{(\.w)?}} [[NEW:r[0-9]+]], r[[OLD]], r0 |
| ; CHECK-NEXT: stlexb [[STATUS:r[0-9]+]], [[NEW]], [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD]] |
| ret i8 %old |
| } |
| |
| define i16 @test_atomic_load_or_i16(i16 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_or_i16: |
| %old = atomicrmw or i16* @var16, i16 %offset monotonic |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var16 |
| ; CHECK: movt r[[ADDR]], :upper16:var16 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldrexh r[[OLD:[0-9]+]], [r[[ADDR]]] |
| ; r0 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: orr{{(\.w)?}} [[NEW:r[0-9]+]], r[[OLD]], r0 |
| ; CHECK-NEXT: strexh [[STATUS:r[0-9]+]], [[NEW]], [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD]] |
| ret i16 %old |
| } |
| |
| define i32 @test_atomic_load_or_i32(i32 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_or_i32: |
| %old = atomicrmw or i32* @var32, i32 %offset acquire |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var32 |
| ; CHECK: movt r[[ADDR]], :upper16:var32 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldaex r[[OLD:[0-9]+]], [r[[ADDR]]] |
| ; r0 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: orr{{(\.w)?}} [[NEW:r[0-9]+]], r[[OLD]], r0 |
| ; CHECK-NEXT: strex [[STATUS:r[0-9]+]], [[NEW]], [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD]] |
| ret i32 %old |
| } |
| |
| define i64 @test_atomic_load_or_i64(i64 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_or_i64: |
| %old = atomicrmw or i64* @var64, i64 %offset release |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var64 |
| ; CHECK: movt r[[ADDR]], :upper16:var64 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldrexd r[[OLD1:[0-9]+]], r[[OLD2:[0-9]+]], [r[[ADDR]]] |
| ; r0, r1 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: orr{{(\.w)?}} [[NEW1:r[0-9]+]], r[[OLD1]], r0 |
| ; CHECK-NEXT: orr{{(\.w)?}} [[NEW2:r[0-9]+]], r[[OLD2]], r1 |
| ; CHECK-NEXT: stlexd [[STATUS:r[0-9]+]], [[NEW1]], [[NEW2]], [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD1]] |
| ; CHECK-NEXT: mov r1, r[[OLD2]] |
| ret i64 %old |
| } |
| |
| define i8 @test_atomic_load_xor_i8(i8 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_xor_i8: |
| %old = atomicrmw xor i8* @var8, i8 %offset acquire |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var8 |
| ; CHECK: movt r[[ADDR]], :upper16:var8 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldaexb r[[OLD:[0-9]+]], [r[[ADDR]]] |
| ; r0 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: eor{{(\.w)?}} [[NEW:r[0-9]+]], r[[OLD]], r0 |
| ; CHECK-NEXT: strexb [[STATUS:r[0-9]+]], [[NEW]], [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD]] |
| ret i8 %old |
| } |
| |
| define i16 @test_atomic_load_xor_i16(i16 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_xor_i16: |
| %old = atomicrmw xor i16* @var16, i16 %offset release |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var16 |
| ; CHECK: movt r[[ADDR]], :upper16:var16 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldrexh r[[OLD:[0-9]+]], [r[[ADDR]]] |
| ; r0 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: eor{{(\.w)?}} [[NEW:r[0-9]+]], r[[OLD]], r0 |
| ; CHECK-NEXT: stlexh [[STATUS:r[0-9]+]], [[NEW]], [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD]] |
| ret i16 %old |
| } |
| |
| define i32 @test_atomic_load_xor_i32(i32 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_xor_i32: |
| %old = atomicrmw xor i32* @var32, i32 %offset seq_cst |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var32 |
| ; CHECK: movt r[[ADDR]], :upper16:var32 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldaex r[[OLD:[0-9]+]], [r[[ADDR]]] |
| ; r0 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: eor{{(\.w)?}} [[NEW:r[0-9]+]], r[[OLD]], r0 |
| ; CHECK-NEXT: stlex [[STATUS:r[0-9]+]], [[NEW]], [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD]] |
| ret i32 %old |
| } |
| |
| define i64 @test_atomic_load_xor_i64(i64 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_xor_i64: |
| %old = atomicrmw xor i64* @var64, i64 %offset monotonic |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var64 |
| ; CHECK: movt r[[ADDR]], :upper16:var64 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldrexd r[[OLD1:[0-9]+]], r[[OLD2:[0-9]+]], [r[[ADDR]]] |
| ; r0, r1 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: eor{{(\.w)?}} [[NEW1:r[0-9]+]], r[[OLD1]], r0 |
| ; CHECK-NEXT: eor{{(\.w)?}} [[NEW2:r[0-9]+]], r[[OLD2]], r1 |
| ; CHECK-NEXT: strexd [[STATUS:r[0-9]+]], [[NEW1]], [[NEW2]], [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD1]] |
| ; CHECK-NEXT: mov r1, r[[OLD2]] |
| ret i64 %old |
| } |
| |
| define i8 @test_atomic_load_xchg_i8(i8 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_xchg_i8: |
| %old = atomicrmw xchg i8* @var8, i8 %offset monotonic |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var8 |
| ; CHECK: movt r[[ADDR]], :upper16:var8 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldrexb r[[OLD:[0-9]+]], [r[[ADDR]]] |
| ; r0 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: strexb [[STATUS:r[0-9]+]], r0, [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD]] |
| ret i8 %old |
| } |
| |
| define i16 @test_atomic_load_xchg_i16(i16 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_xchg_i16: |
| %old = atomicrmw xchg i16* @var16, i16 %offset seq_cst |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var16 |
| ; CHECK: movt r[[ADDR]], :upper16:var16 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldaexh r[[OLD:[0-9]+]], [r[[ADDR]]] |
| ; r0 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: stlexh [[STATUS:r[0-9]+]], r0, [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD]] |
| ret i16 %old |
| } |
| |
| define i32 @test_atomic_load_xchg_i32(i32 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_xchg_i32: |
| %old = atomicrmw xchg i32* @var32, i32 %offset release |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var32 |
| ; CHECK: movt r[[ADDR]], :upper16:var32 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldrex r[[OLD:[0-9]+]], [r[[ADDR]]] |
| ; r0 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: stlex [[STATUS:r[0-9]+]], r0, [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD]] |
| ret i32 %old |
| } |
| |
| define i64 @test_atomic_load_xchg_i64(i64 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_xchg_i64: |
| %old = atomicrmw xchg i64* @var64, i64 %offset acquire |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var64 |
| ; CHECK: movt r[[ADDR]], :upper16:var64 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldaexd r[[OLD1:[0-9]+]], r[[OLD2:[0-9]+]], [r[[ADDR]]] |
| ; r0, r1 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: strexd [[STATUS:r[0-9]+]], r0, r1, [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD1]] |
| ; CHECK-NEXT: mov r1, r[[OLD2]] |
| ret i64 %old |
| } |
| |
| define i8 @test_atomic_load_min_i8(i8 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_min_i8: |
| %old = atomicrmw min i8* @var8, i8 %offset acquire |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var8 |
| ; CHECK: movt r[[ADDR]], :upper16:var8 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldaexb r[[OLD:[0-9]+]], [r[[ADDR]]] |
| ; CHECK-NEXT: sxtb r[[OLDX:[0-9]+]], r[[OLD]] |
| ; r0 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: cmp r[[OLDX]], r0 |
| ; Thumb mode: it ge |
| ; CHECK: movge r[[OLDX]], r0 |
| ; CHECK-NEXT: strexb [[STATUS:r[0-9]+]], r[[OLDX]], [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD]] |
| ret i8 %old |
| } |
| |
| define i16 @test_atomic_load_min_i16(i16 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_min_i16: |
| %old = atomicrmw min i16* @var16, i16 %offset release |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var16 |
| ; CHECK: movt r[[ADDR]], :upper16:var16 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldrexh r[[OLD:[0-9]+]], [r[[ADDR]]] |
| ; CHECK-NEXT: sxth r[[OLDX:[0-9]+]], r[[OLD]] |
| ; r0 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: cmp r[[OLDX]], r0 |
| ; Thumb mode: it ge |
| ; CHECK: movge r[[OLDX]], r0 |
| ; CHECK-NEXT: stlexh [[STATUS:r[0-9]+]], r[[OLDX]], [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD]] |
| ret i16 %old |
| } |
| |
| define i32 @test_atomic_load_min_i32(i32 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_min_i32: |
| %old = atomicrmw min i32* @var32, i32 %offset monotonic |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var32 |
| ; CHECK: movt r[[ADDR]], :upper16:var32 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldrex r[[OLD:[0-9]+]], [r[[ADDR]]] |
| ; r0 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: mov r[[NEW:[0-9]+]], r0 |
| ; CHECK-NEXT: cmp r[[OLD]], r0 |
| ; Thumb mode: it lt |
| ; CHECK: movlt r[[NEW]], r[[OLD]] |
| ; CHECK-NEXT: strex [[STATUS:r[0-9]+]], r[[NEW]], [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD]] |
| ret i32 %old |
| } |
| |
| define i64 @test_atomic_load_min_i64(i64 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_min_i64: |
| %old = atomicrmw min i64* @var64, i64 %offset seq_cst |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var64 |
| ; CHECK: movt r[[ADDR]], :upper16:var64 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldaexd r[[OLD1:[0-9]+]], r[[OLD2:[0-9]+]], [r[[ADDR]]] |
| ; r0, r1 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: subs [[NEW:r[0-9]+]], r[[OLD1]], r0 |
| ; CHECK-NEXT: sbcs{{(\.w)?}} [[NEW]], r[[OLD2]], r1 |
| ; CHECK-NEXT: blt .LBB{{[0-9]+}}_3 |
| ; CHECK-NEXT: BB#2: |
| ; CHECK-NEXT: stlexd [[STATUS:r[0-9]+]], r0, r1, [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD1]] |
| ; CHECK-NEXT: mov r1, r[[OLD2]] |
| ret i64 %old |
| } |
| |
| define i8 @test_atomic_load_max_i8(i8 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_max_i8: |
| %old = atomicrmw max i8* @var8, i8 %offset seq_cst |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var8 |
| ; CHECK: movt r[[ADDR]], :upper16:var8 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldaexb r[[OLD:[0-9]+]], [r[[ADDR]]] |
| ; CHECK-NEXT: sxtb r[[OLDX:[0-9]+]], r[[OLD]] |
| ; r0 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: cmp r[[OLDX]], r0 |
| ; Thumb mode: it le |
| ; CHECK: movle r[[OLDX]], r0 |
| ; CHECK-NEXT: stlexb [[STATUS:r[0-9]+]], r[[OLDX]], [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD]] |
| ret i8 %old |
| } |
| |
| define i16 @test_atomic_load_max_i16(i16 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_max_i16: |
| %old = atomicrmw max i16* @var16, i16 %offset acquire |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var16 |
| ; CHECK: movt r[[ADDR]], :upper16:var16 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldaexh r[[OLD:[0-9]+]], [r[[ADDR]]] |
| ; CHECK-NEXT: sxth r[[OLDX:[0-9]+]], r[[OLD]] |
| ; r0 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: cmp r[[OLDX]], r0 |
| ; Thumb mode: it le |
| ; CHECK: movle r[[OLDX]], r0 |
| ; CHECK-NEXT: strexh [[STATUS:r[0-9]+]], r[[OLDX]], [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD]] |
| ret i16 %old |
| } |
| |
| define i32 @test_atomic_load_max_i32(i32 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_max_i32: |
| %old = atomicrmw max i32* @var32, i32 %offset release |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var32 |
| ; CHECK: movt r[[ADDR]], :upper16:var32 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldrex r[[OLD:[0-9]+]], [r[[ADDR]]] |
| ; r0 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: mov r[[NEW:[0-9]+]], r0 |
| ; CHECK-NEXT: cmp r[[OLD]], r0 |
| ; Thumb mode: it gt |
| ; CHECK: movgt r[[NEW]], r[[OLD]] |
| ; CHECK-NEXT: stlex [[STATUS:r[0-9]+]], r[[NEW]], [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD]] |
| ret i32 %old |
| } |
| |
| define i64 @test_atomic_load_max_i64(i64 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_max_i64: |
| %old = atomicrmw max i64* @var64, i64 %offset monotonic |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var64 |
| ; CHECK: movt r[[ADDR]], :upper16:var64 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldrexd r[[OLD1:[0-9]+]], r[[OLD2:[0-9]+]], [r[[ADDR]]] |
| ; r0, r1 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: subs [[NEW:r[0-9]+]], r[[OLD1]], r0 |
| ; CHECK-NEXT: sbcs{{(\.w)?}} [[NEW]], r[[OLD2]], r1 |
| ; CHECK-NEXT: bge .LBB{{[0-9]+}}_3 |
| ; CHECK-NEXT: BB#2: |
| ; CHECK-NEXT: strexd [[STATUS:r[0-9]+]], r0, r1, [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD1]] |
| ; CHECK-NEXT: mov r1, r[[OLD2]] |
| ret i64 %old |
| } |
| |
| define i8 @test_atomic_load_umin_i8(i8 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_umin_i8: |
| %old = atomicrmw umin i8* @var8, i8 %offset monotonic |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var8 |
| ; CHECK: movt r[[ADDR]], :upper16:var8 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldrexb r[[OLD:[0-9]+]], [r[[ADDR]]] |
| ; r0 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: mov r[[NEW:[0-9]+]], r0 |
| ; CHECK-NEXT: cmp r[[OLD]], r0 |
| ; Thumb mode: it lo |
| ; CHECK: movlo r[[NEW]], r[[OLD]] |
| ; CHECK-NEXT: strexb [[STATUS:r[0-9]+]], r[[NEW]], [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD]] |
| ret i8 %old |
| } |
| |
| define i16 @test_atomic_load_umin_i16(i16 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_umin_i16: |
| %old = atomicrmw umin i16* @var16, i16 %offset acquire |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var16 |
| ; CHECK: movt r[[ADDR]], :upper16:var16 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldaexh r[[OLD:[0-9]+]], [r[[ADDR]]] |
| ; r0 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: mov r[[NEW:[0-9]+]], r0 |
| ; CHECK-NEXT: cmp r[[OLD]], r0 |
| ; Thumb mode: it lo |
| ; CHECK: movlo r[[NEW]], r[[OLD]] |
| ; CHECK-NEXT: strexh [[STATUS:r[0-9]+]], r[[NEW]], [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD]] |
| ret i16 %old |
| } |
| |
| define i32 @test_atomic_load_umin_i32(i32 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_umin_i32: |
| %old = atomicrmw umin i32* @var32, i32 %offset seq_cst |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var32 |
| ; CHECK: movt r[[ADDR]], :upper16:var32 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldaex r[[OLD:[0-9]+]], [r[[ADDR]]] |
| ; r0 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: mov r[[NEW:[0-9]+]], r0 |
| ; CHECK-NEXT: cmp r[[OLD]], r0 |
| ; Thumb mode: it lo |
| ; CHECK: movlo r[[NEW]], r[[OLD]] |
| ; CHECK-NEXT: stlex [[STATUS:r[0-9]+]], r[[NEW]], [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD]] |
| ret i32 %old |
| } |
| |
| define i64 @test_atomic_load_umin_i64(i64 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_umin_i64: |
| %old = atomicrmw umin i64* @var64, i64 %offset acq_rel |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var64 |
| ; CHECK: movt r[[ADDR]], :upper16:var64 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldaexd r[[OLD1:[0-9]+]], r[[OLD2:[0-9]+]], [r[[ADDR]]] |
| ; r0, r1 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: subs [[NEW:r[0-9]+]], r[[OLD1]], r0 |
| ; CHECK-NEXT: sbcs{{(\.w)?}} [[NEW]], r[[OLD2]], r1 |
| ; CHECK-NEXT: blo .LBB{{[0-9]+}}_3 |
| ; CHECK-NEXT: BB#2: |
| ; CHECK-NEXT: stlexd [[STATUS:r[0-9]+]], r0, r1, [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD1]] |
| ; CHECK-NEXT: mov r1, r[[OLD2]] |
| ret i64 %old |
| } |
| |
| define i8 @test_atomic_load_umax_i8(i8 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_umax_i8: |
| %old = atomicrmw umax i8* @var8, i8 %offset acq_rel |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var8 |
| ; CHECK: movt r[[ADDR]], :upper16:var8 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldaexb r[[OLD:[0-9]+]], [r[[ADDR]]] |
| ; r0 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: mov r[[NEW:[0-9]+]], r0 |
| ; CHECK-NEXT: cmp r[[OLD]], r0 |
| ; Thumb mode: it hi |
| ; CHECK: movhi r[[NEW]], r[[OLD]] |
| ; CHECK-NEXT: stlexb [[STATUS:r[0-9]+]], r[[NEW]], [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD]] |
| ret i8 %old |
| } |
| |
| define i16 @test_atomic_load_umax_i16(i16 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_umax_i16: |
| %old = atomicrmw umax i16* @var16, i16 %offset monotonic |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var16 |
| ; CHECK: movt r[[ADDR]], :upper16:var16 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldrexh r[[OLD:[0-9]+]], [r[[ADDR]]] |
| ; r0 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: mov r[[NEW:[0-9]+]], r0 |
| ; CHECK-NEXT: cmp r[[OLD]], r0 |
| ; Thumb mode: it hi |
| ; CHECK: movhi r[[NEW]], r[[OLD]] |
| ; CHECK-NEXT: strexh [[STATUS:r[0-9]+]], r[[NEW]], [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD]] |
| ret i16 %old |
| } |
| |
| define i32 @test_atomic_load_umax_i32(i32 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_umax_i32: |
| %old = atomicrmw umax i32* @var32, i32 %offset seq_cst |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var32 |
| ; CHECK: movt r[[ADDR]], :upper16:var32 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldaex r[[OLD:[0-9]+]], [r[[ADDR]]] |
| ; r0 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: mov r[[NEW:[0-9]+]], r0 |
| ; CHECK-NEXT: cmp r[[OLD]], r0 |
| ; Thumb mode: it hi |
| ; CHECK: movhi r[[NEW]], r[[OLD]] |
| ; CHECK-NEXT: stlex [[STATUS:r[0-9]+]], r[[NEW]], [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD]] |
| ret i32 %old |
| } |
| |
| define i64 @test_atomic_load_umax_i64(i64 %offset) nounwind { |
| ; CHECK-LABEL: test_atomic_load_umax_i64: |
| %old = atomicrmw umax i64* @var64, i64 %offset release |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var64 |
| ; CHECK: movt r[[ADDR]], :upper16:var64 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldrexd r[[OLD1:[0-9]+]], r[[OLD2:[0-9]+]], [r[[ADDR]]] |
| ; r0, r1 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: subs [[NEW:r[0-9]+]], r[[OLD1]], r0 |
| ; CHECK-NEXT: sbcs{{(\.w)?}} [[NEW]], r[[OLD2]], r1 |
| ; CHECK-NEXT: bhs .LBB{{[0-9]+}}_3 |
| ; CHECK-NEXT: BB#2: |
| ; CHECK-NEXT: stlexd [[STATUS:r[0-9]+]], r0, r1, [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD1]] |
| ; CHECK-NEXT: mov r1, r[[OLD2]] |
| ret i64 %old |
| } |
| |
| define i8 @test_atomic_cmpxchg_i8(i8 %wanted, i8 %new) nounwind { |
| ; CHECK-LABEL: test_atomic_cmpxchg_i8: |
| %old = cmpxchg i8* @var8, i8 %wanted, i8 %new acquire |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var8 |
| ; CHECK: movt r[[ADDR]], :upper16:var8 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldaexb r[[OLD:[0-9]+]], [r[[ADDR]]] |
| ; r0 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: cmp r[[OLD]], r0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_3 |
| ; CHECK-NEXT: BB#2: |
| ; As above, r1 is a reasonable guess. |
| ; CHECK-NEXT: strexb [[STATUS:r[0-9]+]], r1, [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD]] |
| ret i8 %old |
| } |
| |
| define i16 @test_atomic_cmpxchg_i16(i16 %wanted, i16 %new) nounwind { |
| ; CHECK-LABEL: test_atomic_cmpxchg_i16: |
| %old = cmpxchg i16* @var16, i16 %wanted, i16 %new seq_cst |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var16 |
| ; CHECK: movt r[[ADDR]], :upper16:var16 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldaexh r[[OLD:[0-9]+]], [r[[ADDR]]] |
| ; r0 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: cmp r[[OLD]], r0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_3 |
| ; CHECK-NEXT: BB#2: |
| ; As above, r1 is a reasonable guess. |
| ; CHECK-NEXT: stlexh [[STATUS:r[0-9]+]], r1, [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD]] |
| ret i16 %old |
| } |
| |
| define i32 @test_atomic_cmpxchg_i32(i32 %wanted, i32 %new) nounwind { |
| ; CHECK-LABEL: test_atomic_cmpxchg_i32: |
| %old = cmpxchg i32* @var32, i32 %wanted, i32 %new release |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var32 |
| ; CHECK: movt r[[ADDR]], :upper16:var32 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldrex r[[OLD:[0-9]+]], [r[[ADDR]]] |
| ; r0 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: cmp r[[OLD]], r0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_3 |
| ; CHECK-NEXT: BB#2: |
| ; As above, r1 is a reasonable guess. |
| ; CHECK-NEXT: stlex [[STATUS:r[0-9]+]], r1, [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, r[[OLD]] |
| ret i32 %old |
| } |
| |
| define i64 @test_atomic_cmpxchg_i64(i64 %wanted, i64 %new) nounwind { |
| ; CHECK-LABEL: test_atomic_cmpxchg_i64: |
| %old = cmpxchg i64* @var64, i64 %wanted, i64 %new monotonic |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var64 |
| ; CHECK: movt r[[ADDR]], :upper16:var64 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; CHECK-NEXT: ldrexd [[OLD1:r[0-9]+|lr]], [[OLD2:r[0-9]+|lr]], [r[[ADDR]]] |
| ; r0, r1 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK-NEXT: cmp [[OLD1]], r0 |
| ; Thumb mode: it eq |
| ; CHECK: cmpeq [[OLD2]], r1 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_3 |
| ; CHECK-NEXT: BB#2: |
| ; As above, r2, r3 is a reasonable guess. |
| ; CHECK-NEXT: strexd [[STATUS:r[0-9]+]], r2, r3, [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ; CHECK: mov r0, [[OLD1]] |
| ; CHECK-NEXT: mov r1, [[OLD2]] |
| ret i64 %old |
| } |
| |
| define i8 @test_atomic_load_monotonic_i8() nounwind { |
| ; CHECK-LABEL: test_atomic_load_monotonic_i8: |
| %val = load atomic i8* @var8 monotonic, align 1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var8 |
| ; CHECK: movt r[[ADDR]], :upper16:var8 |
| ; CHECK: ldrb r0, [r[[ADDR]]] |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ret i8 %val |
| } |
| |
| define i8 @test_atomic_load_monotonic_regoff_i8(i64 %base, i64 %off) nounwind { |
| ; CHECK-LABEL: test_atomic_load_monotonic_regoff_i8: |
| %addr_int = add i64 %base, %off |
| %addr = inttoptr i64 %addr_int to i8* |
| |
| %val = load atomic i8* %addr monotonic, align 1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: ldrb r0, [r0, r2] |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ret i8 %val |
| } |
| |
| define i8 @test_atomic_load_acquire_i8() nounwind { |
| ; CHECK-LABEL: test_atomic_load_acquire_i8: |
| %val = load atomic i8* @var8 acquire, align 1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var8 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movt r[[ADDR]], :upper16:var8 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: ldab r0, [r[[ADDR]]] |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ret i8 %val |
| } |
| |
| define i8 @test_atomic_load_seq_cst_i8() nounwind { |
| ; CHECK-LABEL: test_atomic_load_seq_cst_i8: |
| %val = load atomic i8* @var8 seq_cst, align 1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var8 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movt r[[ADDR]], :upper16:var8 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: ldab r0, [r[[ADDR]]] |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ret i8 %val |
| } |
| |
| define i16 @test_atomic_load_monotonic_i16() nounwind { |
| ; CHECK-LABEL: test_atomic_load_monotonic_i16: |
| %val = load atomic i16* @var16 monotonic, align 2 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var16 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movt r[[ADDR]], :upper16:var16 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: ldrh r0, [r[[ADDR]]] |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ret i16 %val |
| } |
| |
| define i32 @test_atomic_load_monotonic_regoff_i32(i64 %base, i64 %off) nounwind { |
| ; CHECK-LABEL: test_atomic_load_monotonic_regoff_i32: |
| %addr_int = add i64 %base, %off |
| %addr = inttoptr i64 %addr_int to i32* |
| |
| %val = load atomic i32* %addr monotonic, align 4 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: ldr r0, [r0, r2] |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ret i32 %val |
| } |
| |
| define i64 @test_atomic_load_seq_cst_i64() nounwind { |
| ; CHECK-LABEL: test_atomic_load_seq_cst_i64: |
| %val = load atomic i64* @var64 seq_cst, align 8 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var64 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movt r[[ADDR]], :upper16:var64 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: ldaexd r0, r1, [r[[ADDR]]] |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ret i64 %val |
| } |
| |
| define void @test_atomic_store_monotonic_i8(i8 %val) nounwind { |
| ; CHECK-LABEL: test_atomic_store_monotonic_i8: |
| store atomic i8 %val, i8* @var8 monotonic, align 1 |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var8 |
| ; CHECK: movt r[[ADDR]], :upper16:var8 |
| ; CHECK: strb r0, [r[[ADDR]]] |
| |
| ret void |
| } |
| |
| define void @test_atomic_store_monotonic_regoff_i8(i64 %base, i64 %off, i8 %val) nounwind { |
| ; CHECK-LABEL: test_atomic_store_monotonic_regoff_i8: |
| |
| %addr_int = add i64 %base, %off |
| %addr = inttoptr i64 %addr_int to i8* |
| |
| store atomic i8 %val, i8* %addr monotonic, align 1 |
| ; CHECK: ldrb{{(\.w)?}} [[VAL:r[0-9]+]], [sp] |
| ; CHECK: strb [[VAL]], [r0, r2] |
| |
| ret void |
| } |
| |
| define void @test_atomic_store_release_i8(i8 %val) nounwind { |
| ; CHECK-LABEL: test_atomic_store_release_i8: |
| store atomic i8 %val, i8* @var8 release, align 1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var8 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movt r[[ADDR]], :upper16:var8 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: stlb r0, [r[[ADDR]]] |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ret void |
| } |
| |
| define void @test_atomic_store_seq_cst_i8(i8 %val) nounwind { |
| ; CHECK-LABEL: test_atomic_store_seq_cst_i8: |
| store atomic i8 %val, i8* @var8 seq_cst, align 1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var8 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movt r[[ADDR]], :upper16:var8 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: stlb r0, [r[[ADDR]]] |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ret void |
| } |
| |
| define void @test_atomic_store_monotonic_i16(i16 %val) nounwind { |
| ; CHECK-LABEL: test_atomic_store_monotonic_i16: |
| store atomic i16 %val, i16* @var16 monotonic, align 2 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var16 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movt r[[ADDR]], :upper16:var16 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: strh r0, [r[[ADDR]]] |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ret void |
| } |
| |
| define void @test_atomic_store_monotonic_regoff_i32(i64 %base, i64 %off, i32 %val) nounwind { |
| ; CHECK-LABEL: test_atomic_store_monotonic_regoff_i32: |
| |
| %addr_int = add i64 %base, %off |
| %addr = inttoptr i64 %addr_int to i32* |
| |
| store atomic i32 %val, i32* %addr monotonic, align 4 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: ldr [[VAL:r[0-9]+]], [sp] |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: str [[VAL]], [r0, r2] |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ret void |
| } |
| |
| define void @test_atomic_store_release_i64(i64 %val) nounwind { |
| ; CHECK-LABEL: test_atomic_store_release_i64: |
| store atomic i64 %val, i64* @var64 release, align 8 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| ; CHECK: movw r[[ADDR:[0-9]+]], :lower16:var64 |
| ; CHECK: movt r[[ADDR]], :upper16:var64 |
| |
| ; CHECK: .LBB{{[0-9]+}}_1: |
| ; r0, r1 below is a reasonable guess but could change: it certainly comes into the |
| ; function there. |
| ; CHECK: stlexd [[STATUS:r[0-9]+]], r0, r1, [r[[ADDR]]] |
| ; CHECK-NEXT: cmp [[STATUS]], #0 |
| ; CHECK-NEXT: bne .LBB{{[0-9]+}}_1 |
| ; CHECK-NOT: dmb |
| ; CHECK-NOT: mcr |
| |
| ret void |
| } |
| |
| define i32 @not.barriers(i32* %var, i1 %cond) { |
| ; CHECK-LABEL: not.barriers: |
| br i1 %cond, label %atomic_ver, label %simple_ver |
| simple_ver: |
| %oldval = load i32* %var |
| %newval = add nsw i32 %oldval, -1 |
| store i32 %newval, i32* %var |
| br label %somewhere |
| atomic_ver: |
| fence seq_cst |
| %val = atomicrmw add i32* %var, i32 -1 monotonic |
| fence seq_cst |
| br label %somewhere |
| ; CHECK: dmb |
| ; CHECK: ldrex |
| ; CHECK: dmb |
| ; The key point here is that the second dmb isn't immediately followed by the |
| ; simple_ver basic block, which LLVM attempted to do when DMB had been marked |
| ; with isBarrier. For now, look for something that looks like "somewhere". |
| ; CHECK-NEXT: mov |
| somewhere: |
| %combined = phi i32 [ %val, %atomic_ver ], [ %newval, %simple_ver] |
| ret i32 %combined |
| } |