e737847b8f
optimizePow does not create any new calls to pow, so it should work regardless of whether the pow library function is available. This allows it to optimize the llvm.pow intrinsic on targets with no math library. Based on a patch by Tim Renouf. Differential Revision: https://reviews.llvm.org/D68231
61 lines
2.2 KiB
LLVM
61 lines
2.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -disable-simplify-libcalls -instcombine -S | FileCheck %s
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declare double @llvm.pow.f64(double, double)
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declare double @pow(double, double)
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define double @sqrt_libcall(double %x) {
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; CHECK-LABEL: @sqrt_libcall(
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; CHECK-NEXT: [[RETVAL:%.*]] = call double @pow(double [[X:%.*]], double 5.000000e-01)
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; CHECK-NEXT: ret double [[RETVAL]]
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;
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%retval = call double @pow(double %x, double 0.5)
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ret double %retval
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}
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define double @sqrt_intrinsic(double %x) {
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; CHECK-LABEL: @sqrt_intrinsic(
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; CHECK-NEXT: [[SQRT:%.*]] = call double @llvm.sqrt.f64(double [[X:%.*]])
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; CHECK-NEXT: [[ABS:%.*]] = call double @llvm.fabs.f64(double [[SQRT]])
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; CHECK-NEXT: [[ISINF:%.*]] = fcmp oeq double [[X]], 0xFFF0000000000000
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; CHECK-NEXT: [[TMP1:%.*]] = select i1 [[ISINF]], double 0x7FF0000000000000, double [[ABS]]
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; CHECK-NEXT: ret double [[TMP1]]
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;
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%retval = call double @llvm.pow.f64(double %x, double 0.5)
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ret double %retval
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}
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; Shrinking is disabled too.
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define float @shrink_libcall(float %f, float %g) {
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; CHECK-LABEL: @shrink_libcall(
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; CHECK-NEXT: [[DF:%.*]] = fpext float [[F:%.*]] to double
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; CHECK-NEXT: [[DG:%.*]] = fpext float [[G:%.*]] to double
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; CHECK-NEXT: [[CALL:%.*]] = call fast double @pow(double [[DF]], double [[DG]])
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; CHECK-NEXT: [[FR:%.*]] = fptrunc double [[CALL]] to float
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; CHECK-NEXT: ret float [[FR]]
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;
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%df = fpext float %f to double
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%dg = fpext float %g to double
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%call = call fast double @pow(double %df, double %dg)
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%fr = fptrunc double %call to float
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ret float %fr
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}
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; Shrinking is disabled for the intrinsic too.
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define float @shrink_intrinsic(float %f, float %g) {
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; CHECK-LABEL: @shrink_intrinsic(
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; CHECK-NEXT: [[DF:%.*]] = fpext float [[F:%.*]] to double
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; CHECK-NEXT: [[DG:%.*]] = fpext float [[G:%.*]] to double
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; CHECK-NEXT: [[CALL:%.*]] = call fast double @llvm.pow.f64(double [[DF]], double [[DG]])
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; CHECK-NEXT: [[FR:%.*]] = fptrunc double [[CALL]] to float
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; CHECK-NEXT: ret float [[FR]]
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;
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%df = fpext float %f to double
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%dg = fpext float %g to double
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%call = call fast double @llvm.pow.f64(double %df, double %dg)
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%fr = fptrunc double %call to float
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ret float %fr
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}
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