| ; Verify that floating-point strict signaling compares cannot be omitted |
| ; even if CC already has the right value. |
| ; |
| ; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 \ |
| ; RUN: -enable-misched=0 -no-integrated-as | FileCheck %s |
| ; |
| ; We need -enable-misched=0 to make sure f12 and following routines really |
| ; test the compare elimination pass. |
| |
| |
| declare float @llvm.fabs.f32(float %f) |
| |
| ; Test addition followed by EQ, which could use the CC result of the addition. |
| define float @f1(float %a, float %b, ptr %dest) #0 { |
| ; CHECK-LABEL: f1: |
| ; CHECK-DAG: aebr %f0, %f2 |
| ; CHECK-DAG: lzer [[REG:%f[0-9]+]] |
| ; CHECK-NEXT: kebr %f0, [[REG]] |
| ; CHECK-NEXT: ber %r14 |
| ; CHECK: br %r14 |
| entry: |
| %res = call float @llvm.experimental.constrained.fadd.f32( |
| float %a, float %b, |
| metadata !"round.dynamic", |
| metadata !"fpexcept.strict") #0 |
| %cmp = call i1 @llvm.experimental.constrained.fcmps.f32( |
| float %res, float 0.0, |
| metadata !"oeq", |
| metadata !"fpexcept.strict") #0 |
| br i1 %cmp, label %exit, label %store |
| |
| store: |
| store float %b, ptr %dest |
| br label %exit |
| |
| exit: |
| ret float %res |
| } |
| |
| ; Test the result of LOAD POSITIVE. |
| define float @f6(float %dummy, float %a, ptr %dest) #0 { |
| ; CHECK-LABEL: f6: |
| ; CHECK-DAG: lpdfr %f0, %f2 |
| ; CHECK-DAG: lzer [[REG:%f[0-9]+]] |
| ; CHECK-NEXT: kebr %f0, [[REG]] |
| ; CHECK-NEXT: bhr %r14 |
| ; CHECK: br %r14 |
| entry: |
| %res = call float @llvm.fabs.f32(float %a) #0 |
| %cmp = call i1 @llvm.experimental.constrained.fcmps.f32( |
| float %res, float 0.0, |
| metadata !"ogt", |
| metadata !"fpexcept.strict") #0 |
| br i1 %cmp, label %exit, label %store |
| |
| store: |
| store float %res, ptr %dest |
| br label %exit |
| |
| exit: |
| ret float %res |
| } |
| |
| ; Test the result of LOAD NEGATIVE. |
| define float @f7(float %dummy, float %a, ptr %dest) #0 { |
| ; CHECK-LABEL: f7: |
| ; CHECK-DAG: lndfr %f0, %f2 |
| ; CHECK-DAG: lzer [[REG:%f[0-9]+]] |
| ; CHECK-NEXT: kebr %f0, [[REG]] |
| ; CHECK-NEXT: blr %r14 |
| ; CHECK: br %r14 |
| entry: |
| %abs = call float @llvm.fabs.f32(float %a) #0 |
| %res = fneg float %abs |
| %cmp = call i1 @llvm.experimental.constrained.fcmps.f32( |
| float %res, float 0.0, |
| metadata !"olt", |
| metadata !"fpexcept.strict") #0 |
| br i1 %cmp, label %exit, label %store |
| |
| store: |
| store float %res, ptr %dest |
| br label %exit |
| |
| exit: |
| ret float %res |
| } |
| |
| ; Test the result of LOAD COMPLEMENT. |
| define float @f8(float %dummy, float %a, ptr %dest) #0 { |
| ; CHECK-LABEL: f8: |
| ; CHECK-DAG: lcdfr %f0, %f2 |
| ; CHECK-DAG: lzer [[REG:%f[0-9]+]] |
| ; CHECK-NEXT: kebr %f0, [[REG]] |
| ; CHECK-NEXT: bler %r14 |
| ; CHECK: br %r14 |
| entry: |
| %res = fneg float %a |
| %cmp = call i1 @llvm.experimental.constrained.fcmps.f32( |
| float %res, float 0.0, |
| metadata !"ole", |
| metadata !"fpexcept.strict") #0 |
| br i1 %cmp, label %exit, label %store |
| |
| store: |
| store float %res, ptr %dest |
| br label %exit |
| |
| exit: |
| ret float %res |
| } |
| |
| ; Test that LER does not get converted to LTEBR. |
| define float @f12(float %dummy, float %val) #0 { |
| ; CHECK-LABEL: f12: |
| ; CHECK: ler %f0, %f2 |
| ; CHECK-NEXT: #APP |
| ; CHECK-NEXT: blah %f0 |
| ; CHECK-NEXT: #NO_APP |
| ; CHECK-NEXT: lzer [[REG:%f[0-9]+]] |
| ; CHECK-NEXT: kebr %f2, [[REG]] |
| ; CHECK-NEXT: blr %r14 |
| ; CHECK: br %r14 |
| entry: |
| %ret = call float asm "blah $1", "=f,{f0}"(float %val) #0 |
| %cmp = call i1 @llvm.experimental.constrained.fcmps.f32( |
| float %val, float 0.0, |
| metadata !"olt", |
| metadata !"fpexcept.strict") #0 |
| br i1 %cmp, label %exit, label %store |
| |
| store: |
| call void asm sideeffect "blah", ""() #0 |
| br label %exit |
| |
| exit: |
| ret float %ret |
| } |
| |
| attributes #0 = { strictfp } |
| |
| declare float @llvm.experimental.constrained.fadd.f32(float, float, metadata, metadata) |
| declare float @llvm.experimental.constrained.fsub.f32(float, float, metadata, metadata) |
| declare float @llvm.experimental.constrained.fmul.f32(float, float, metadata, metadata) |
| declare float @llvm.experimental.constrained.fdiv.f32(float, float, metadata, metadata) |
| declare i1 @llvm.experimental.constrained.fcmps.f32(float, float, metadata, metadata) |
| declare i1 @llvm.experimental.constrained.fcmps.f64(double, double, metadata, metadata) |
| declare i1 @llvm.experimental.constrained.fcmps.f128(fp128, fp128, metadata, metadata) |