| # RUN: llc -mtriple=aarch64-linux-gnu -verify-machineinstrs -run-pass=aarch64-ldst-opt %s -o - | FileCheck %s |
| # |
| # When the AArch64 Load Store Optimization pass tries to convert load instructions |
| # into a ldp instruction, and when the base register of the second ldr instruction |
| # has been modified in between these two ldr instructions, the conversion should not |
| # occur. |
| # |
| # For example, for the following pattern: |
| # ldr x9 [x10] |
| # ldr x10 [x8] |
| # ldr x10 [x10, 8], |
| # the first and third ldr instructions cannot be converted to ldp x9, x10, [x10]. |
| # |
| # CHECK-LABEL: name: ldr-modified-baseReg-no-ldp1 |
| # CHECK-NOT: LDP |
| # CHECK: $x9 = LDRXui $x10, 1 :: (load (s64)) |
| # CHECK: $x10 = LDURXi $x8, 1 :: (load (s64)) |
| # CHECK: $x10 = LDRXui $x10, 0 :: (load (s64)) |
| # CHECK: RET |
| --- |
| name: ldr-modified-baseReg-no-ldp1 |
| tracksRegLiveness: true |
| body: | |
| bb.0: |
| liveins: $x8, $x10 |
| |
| $x9 = LDRXui $x10, 1 :: (load (s64)) |
| $x10 = LDURXi $x8, 1 :: (load (s64)) |
| $x10 = LDRXui $x10, 0 :: (load (s64)) |
| RET undef $lr, implicit undef $w0 |
| ... |
| |
| # CHECK-LABEL: name: str-modified-baseReg-no-stp1 |
| # CHECK-NOT: STP |
| # CHECK: STRXui $x9, $x10, 1 :: (store (s64)) |
| # CHECK: $x10 = LDRXui $x8, 0 :: (load (s64)) |
| # CHECK: STRXui $x10, $x10, 0 :: (store (s64)) |
| # CHECK: RET |
| --- |
| name: str-modified-baseReg-no-stp1 |
| tracksRegLiveness: true |
| body: | |
| bb.0: |
| liveins: $x9, $x8, $x10 |
| |
| STRXui $x9, $x10, 1 :: (store (s64)) |
| $x10 = LDRXui $x8, 0 :: (load (s64)) |
| STRXui $x10, $x10, 0 :: (store (s64)) |
| RET undef $lr, implicit undef $w0 |
| ... |
| |
| # CHECK-LABEL: name: ldr-modified-baseReg-no-ldp2 |
| # CHECK-NOT: LDP |
| # CHECK: $x9 = LDRXui $x10, 1 :: (load (s64)) |
| # CHECK: $x10 = MOVi64imm 13 |
| # CHECK: $x11 = LDRXui $x10, 0 :: (load (s64)) |
| # CHECK: RET |
| --- |
| name: ldr-modified-baseReg-no-ldp2 |
| tracksRegLiveness: true |
| body: | |
| bb.0: |
| liveins: $x8, $x10 |
| |
| $x9 = LDRXui $x10, 1 :: (load (s64)) |
| $x10 = MOVi64imm 13 |
| $x11 = LDRXui $x10, 0 :: (load (s64)) |
| RET undef $lr, implicit undef $w0 |
| ... |
| |
| # CHECK-LABEL: name: ldr-modified-baseReg-no-ldp3 |
| # CHECK-NOT: LDP |
| # CHECK: $x9 = LDRXui $x10, 1 :: (load (s64)) |
| # CHECK: $x10 = ADDXri $x8, $x11, 0 |
| # CHECK: $x12 = LDRXui $x10, 0 :: (load (s64)) |
| # CHECK: RET |
| --- |
| name: ldr-modified-baseReg-no-ldp3 |
| tracksRegLiveness: true |
| body: | |
| bb.0: |
| liveins: $x8, $x10, $x11 |
| |
| $x9 = LDRXui $x10, 1 :: (load (s64)) |
| $x10 = ADDXri $x8, $x11, 0 |
| $x12 = LDRXui $x10, 0 :: (load (s64)) |
| RET undef $lr, implicit undef $w0 |
| ... |
| |
| # CHECK-LABEL: name: ldr-modified-baseAddr-convert-to-ldp |
| # CHECK: $x12, $x9 = LDPXi $x10, 0 :: (load (s64)) |
| # CHECK: STRXui $x11, $x10, 1 :: (store (s64)) |
| # CHECK: RET |
| --- |
| name: ldr-modified-baseAddr-convert-to-ldp |
| tracksRegLiveness: true |
| body: | |
| bb.0: |
| liveins: $x8, $x10, $x11 |
| |
| $x9 = LDRXui $x10, 1 :: (load (s64)) |
| STRXui $x11, $x10, 1 :: (store (s64)) |
| $x12 = LDRXui $x10, 0 :: (load (s64)) |
| RET undef $lr, implicit undef $w0 |
| ... |