| ; Test STOCGs that are presented as selects. |
| ; |
| ; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z196 | FileCheck %s |
| |
| declare void @foo(ptr) |
| |
| ; Test with the loaded value first. |
| define void @f1(ptr %ptr, i64 %alt, i32 %limit) { |
| ; CHECK-LABEL: f1: |
| ; CHECK: clfi %r4, 42 |
| ; CHECK: stocghe %r3, 0(%r2) |
| ; CHECK: br %r14 |
| %cond = icmp ult i32 %limit, 42 |
| %orig = load i64, ptr %ptr |
| %res = select i1 %cond, i64 %orig, i64 %alt |
| store i64 %res, ptr %ptr |
| ret void |
| } |
| |
| ; ...and with the loaded value second |
| define void @f2(ptr %ptr, i64 %alt, i32 %limit) { |
| ; CHECK-LABEL: f2: |
| ; CHECK: clfi %r4, 42 |
| ; CHECK: stocgl %r3, 0(%r2) |
| ; CHECK: br %r14 |
| %cond = icmp ult i32 %limit, 42 |
| %orig = load i64, ptr %ptr |
| %res = select i1 %cond, i64 %alt, i64 %orig |
| store i64 %res, ptr %ptr |
| ret void |
| } |
| |
| ; Check the high end of the aligned STOCG range. |
| define void @f3(ptr %base, i64 %alt, i32 %limit) { |
| ; CHECK-LABEL: f3: |
| ; CHECK: clfi %r4, 42 |
| ; CHECK: stocghe %r3, 524280(%r2) |
| ; CHECK: br %r14 |
| %ptr = getelementptr i64, ptr %base, i64 65535 |
| %cond = icmp ult i32 %limit, 42 |
| %orig = load i64, ptr %ptr |
| %res = select i1 %cond, i64 %orig, i64 %alt |
| store i64 %res, ptr %ptr |
| ret void |
| } |
| |
| ; Check the next doubleword up. Other sequences besides this one would be OK. |
| define void @f4(ptr %base, i64 %alt, i32 %limit) { |
| ; CHECK-LABEL: f4: |
| ; CHECK: agfi %r2, 524288 |
| ; CHECK: clfi %r4, 42 |
| ; CHECK: stocghe %r3, 0(%r2) |
| ; CHECK: br %r14 |
| %ptr = getelementptr i64, ptr %base, i64 65536 |
| %cond = icmp ult i32 %limit, 42 |
| %orig = load i64, ptr %ptr |
| %res = select i1 %cond, i64 %orig, i64 %alt |
| store i64 %res, ptr %ptr |
| ret void |
| } |
| |
| ; Check the low end of the STOCG range. |
| define void @f5(ptr %base, i64 %alt, i32 %limit) { |
| ; CHECK-LABEL: f5: |
| ; CHECK: clfi %r4, 42 |
| ; CHECK: stocghe %r3, -524288(%r2) |
| ; CHECK: br %r14 |
| %ptr = getelementptr i64, ptr %base, i64 -65536 |
| %cond = icmp ult i32 %limit, 42 |
| %orig = load i64, ptr %ptr |
| %res = select i1 %cond, i64 %orig, i64 %alt |
| store i64 %res, ptr %ptr |
| ret void |
| } |
| |
| ; Check the next doubleword down, with the same comments as f4. |
| define void @f6(ptr %base, i64 %alt, i32 %limit) { |
| ; CHECK-LABEL: f6: |
| ; CHECK: agfi %r2, -524296 |
| ; CHECK: clfi %r4, 42 |
| ; CHECK: stocghe %r3, 0(%r2) |
| ; CHECK: br %r14 |
| %ptr = getelementptr i64, ptr %base, i64 -65537 |
| %cond = icmp ult i32 %limit, 42 |
| %orig = load i64, ptr %ptr |
| %res = select i1 %cond, i64 %orig, i64 %alt |
| store i64 %res, ptr %ptr |
| ret void |
| } |
| |
| ; Try a frame index base. |
| define void @f7(i64 %alt, i32 %limit) { |
| ; CHECK-LABEL: f7: |
| ; CHECK: brasl %r14, foo@PLT |
| ; CHECK: stocghe {{%r[0-9]+}}, {{[0-9]+}}(%r15) |
| ; CHECK: brasl %r14, foo@PLT |
| ; CHECK: br %r14 |
| %ptr = alloca i64 |
| call void @foo(ptr %ptr) |
| %cond = icmp ult i32 %limit, 42 |
| %orig = load i64, ptr %ptr |
| %res = select i1 %cond, i64 %orig, i64 %alt |
| store i64 %res, ptr %ptr |
| call void @foo(ptr %ptr) |
| ret void |
| } |
| |
| ; Test that conditionally-executed stores do not use STOC, since STOC |
| ; is allowed to trap even when the condition is false. |
| define void @f8(i64 %a, i64 %b, ptr %dest) { |
| ; CHECK-LABEL: f8: |
| ; CHECK-NOT: stocg %r3, 0(%r4) |
| ; CHECK: br %r14 |
| entry: |
| %cmp = icmp ule i64 %a, %b |
| br i1 %cmp, label %store, label %exit |
| |
| store: |
| store i64 %b, ptr %dest |
| br label %exit |
| |
| exit: |
| ret void |
| } |