| ; Test that floating-point instructions that set cc are *not* used to |
| ; eliminate *strict* compares for load complement, load negative and load |
| ; positive |
| ; |
| ; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 | FileCheck %s |
| ; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z13 | FileCheck %s |
| |
| ; Load complement (sign-bit flipped). |
| ; Test f32 |
| define float @f1(float %a, float %b, float %f) #0 { |
| ; CHECK-LABEL: f1: |
| ; CHECK: ltebr |
| ; CHECK-NEXT: ber %r14 |
| %neg = fneg float %f |
| %cond = call i1 @llvm.experimental.constrained.fcmp.f32( |
| float %neg, float 0.0, |
| metadata !"oeq", |
| metadata !"fpexcept.strict") #0 |
| %res = select i1 %cond, float %a, float %b |
| ret float %res |
| } |
| |
| ; Test f64 |
| define double @f2(double %a, double %b, double %f) #0 { |
| ; CHECK-LABEL: f2: |
| ; CHECK: ltdbr |
| ; CHECK-NEXT: ber %r14 |
| %neg = fneg double %f |
| %cond = call i1 @llvm.experimental.constrained.fcmp.f64( |
| double %neg, double 0.0, |
| metadata !"oeq", |
| metadata !"fpexcept.strict") #0 |
| %res = select i1 %cond, double %a, double %b |
| ret double %res |
| } |
| |
| ; Negation of floating-point absolute. |
| ; Test f32 |
| declare float @llvm.fabs.f32(float %f) |
| define float @f3(float %a, float %b, float %f) #0 { |
| ; CHECK-LABEL: f3: |
| ; CHECK: ltebr |
| ; CHECK-NEXT: ber %r14 |
| %abs = call float @llvm.fabs.f32(float %f) #0 |
| %neg = fneg float %abs |
| %cond = call i1 @llvm.experimental.constrained.fcmp.f32( |
| float %neg, float 0.0, |
| metadata !"oeq", |
| metadata !"fpexcept.strict") #0 |
| %res = select i1 %cond, float %a, float %b |
| ret float %res |
| } |
| |
| ; Test f64 |
| declare double @llvm.fabs.f64(double %f) |
| define double @f4(double %a, double %b, double %f) #0 { |
| ; CHECK-LABEL: f4: |
| ; CHECK: ltdbr |
| ; CHECK-NEXT: ber %r14 |
| %abs = call double @llvm.fabs.f64(double %f) #0 |
| %neg = fneg double %abs |
| %cond = call i1 @llvm.experimental.constrained.fcmp.f64( |
| double %neg, double 0.0, |
| metadata !"oeq", |
| metadata !"fpexcept.strict") #0 |
| %res = select i1 %cond, double %a, double %b |
| ret double %res |
| } |
| |
| ; Absolute floating-point value. |
| ; Test f32 |
| define float @f5(float %a, float %b, float %f) #0 { |
| ; CHECK-LABEL: f5: |
| ; CHECK: ltebr |
| ; CHECK-NEXT: ber %r14 |
| %abs = call float @llvm.fabs.f32(float %f) #0 |
| %cond = call i1 @llvm.experimental.constrained.fcmp.f32( |
| float %abs, float 0.0, |
| metadata !"oeq", |
| metadata !"fpexcept.strict") #0 |
| %res = select i1 %cond, float %a, float %b |
| ret float %res |
| } |
| |
| ; Test f64 |
| define double @f6(double %a, double %b, double %f) #0 { |
| ; CHECK-LABEL: f6: |
| ; CHECK: ltdbr |
| ; CHECK-NEXT: ber %r14 |
| %abs = call double @llvm.fabs.f64(double %f) #0 |
| %cond = call i1 @llvm.experimental.constrained.fcmp.f64( |
| double %abs, double 0.0, |
| metadata !"oeq", |
| metadata !"fpexcept.strict") #0 |
| %res = select i1 %cond, double %a, double %b |
| ret double %res |
| } |
| |
| attributes #0 = { strictfp } |
| |
| declare i1 @llvm.experimental.constrained.fcmp.f32(float, float, metadata, metadata) |
| declare i1 @llvm.experimental.constrained.fcmp.f64(double, double, metadata, metadata) |
| |