derek.holloway
7502bf64a4
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53 lines
2.0 KiB
LLVM
53 lines
2.0 KiB
LLVM
; RUN: opt -mtriple=amdgcn -passes="require<libcall-lowering-info>,expand-ir-insts<O0>" %s -S -o - | FileCheck --check-prefixes CHECK %s
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; RUN: opt -mtriple=amdgcn -passes="require<libcall-lowering-info>,expand-ir-insts<O1>" %s -S -o - | FileCheck --check-prefixes CHECK,OPT1 %s
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; Check the handling of potentially infinite numerators in the frem
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; expansion at different optimization levels and with different
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; fast-math flags.
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; CHECK-LABEL: define float @frem_x_maybe_inf(float %x, float %y)
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; CHECK: 2:
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; CHECK: [[FABS:%.*]] = call float @llvm.fabs.f32(float %x)
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; CHECK: [[FCMP:%.*]] = fcmp ult float [[FABS]], +inf
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; CHECK-NEXT: %ret = select i1 [[FCMP]], float %{{.*}}, float +qnan
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; CHECK-NEXT: ret float %ret
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; CHECK-LABEL: }
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define float @frem_x_maybe_inf(float %x, float %y) {
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%ret = frem float %x, %y
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ret float %ret
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}
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; OPT1-LABEL: define float @frem_x_assumed_non_inf(float %x, float %y)
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; OPT1: 2:
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; OPT1-NOT: call float @llvm.fabs.f32(float %x)
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; OPT1-NOT: fcmp ult float [[FABS]], +inf
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; OPT1: %ret = select i1 true, float %{{.*}}, float +qnan
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; OPT1-NEXT: ret float %ret
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; OPT1-LABEL: }
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; OPT0-LABEL: define float @frem_x_assumed_non_inf(float %x, float %y)
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; OPT0: 2:
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; OPT0: [[FABS:%.*]] = call float @llvm.fabs.f32(float %x)
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; OPT0: [[FCMP:%.*]] = fcmp ult float [[FABS]], 0x7FF0000000000000
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; OPT0-NEXT: %ret = select i1 [[FCMP]], float %{{.*}}, float 0x7FF8000000000000
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; OPT0-NEXT: ret float %ret
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; OPT0-LABEL: }
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define float @frem_x_assumed_non_inf(float %x, float %y) {
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%absx = call float @llvm.fabs.f32(float %x)
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%noninf = fcmp ult float %absx, 0x7FF0000000000000
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call void @llvm.assume(i1 %noninf)
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%ret = frem float %x, %y
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ret float %ret
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}
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; CHECK-LABEL: define float @frem_ninf(float %x, float %y)
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; CHECK: 2:
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; CHECK-NOT: call float @llvm.fabs.f32(float %x)
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; CHECK-NOT: fcmp ult float [[FABS]], +inf
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; CHECK: %ret = select ninf i1 true, float %{{.*}}, float +qnan
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; CHECK-NEXT: ret float %ret
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; CHECK-LABEL: }
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define float @frem_ninf(float %x, float %y) {
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%ret = frem ninf float %x, %y
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ret float %ret
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}
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