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Shrinkify libcalls: use float versions of double libm functions with fast-math (bug 17850)
When a call to a double-precision libm function has fast-math semantics (via function attribute for now because there is no IR-level FMF on calls), we can avoid fpext/fptrunc operations and use the float version of the call if the input and output are both float. We already do this optimization using a command-line option; this patch just adds the ability for fast-math to use the existing functionality. I moved the cl::opt from InstructionCombining into SimplifyLibCalls because it's only ever used internally to that class. Modified the existing test cases to use the unsafe-fp-math attribute rather than repeating all tests. This patch should solve: http://llvm.org/bugs/show_bug.cgi?id=17850 Differential Revision: http://reviews.llvm.org/D5893 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220390 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Sanjay Patel
parent
d5b89313e0
commit
dc18ebc4b1
@ -40,8 +40,7 @@ protected:
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~LibCallSimplifier() {}
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public:
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LibCallSimplifier(const DataLayout *TD, const TargetLibraryInfo *TLI,
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bool UnsafeFPShrink);
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LibCallSimplifier(const DataLayout *TD, const TargetLibraryInfo *TLI);
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/// optimizeCall - Take the given call instruction and return a more
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/// optimal value to replace the instruction with or 0 if a more
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@ -70,12 +70,6 @@ STATISTIC(NumExpand, "Number of expansions");
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STATISTIC(NumFactor , "Number of factorizations");
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STATISTIC(NumReassoc , "Number of reassociations");
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static cl::opt<bool>
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EnableUnsafeFPShrink("enable-double-float-shrink", cl::Hidden,
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cl::init(false),
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cl::desc("Enable unsafe double to float "
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"shrinking for math lib calls"));
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// Initialization Routines
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void llvm::initializeInstCombine(PassRegistry &Registry) {
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initializeInstCombinerPass(Registry);
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@ -2945,7 +2939,7 @@ public:
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InstCombinerLibCallSimplifier(const DataLayout *DL,
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const TargetLibraryInfo *TLI,
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InstCombiner *IC)
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: LibCallSimplifier(DL, TLI, EnableUnsafeFPShrink) {
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: LibCallSimplifier(DL, TLI) {
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this->IC = IC;
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}
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@ -40,6 +40,13 @@ static cl::opt<bool>
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ColdErrorCalls("error-reporting-is-cold", cl::init(true), cl::Hidden,
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cl::desc("Treat error-reporting calls as cold"));
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static cl::opt<bool>
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EnableUnsafeFPShrink("enable-double-float-shrink", cl::Hidden,
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cl::init(false),
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cl::desc("Enable unsafe double to float "
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"shrinking for math lib calls"));
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//===----------------------------------------------------------------------===//
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// Helper Functions
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//===----------------------------------------------------------------------===//
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@ -1989,6 +1996,20 @@ Value *LibCallSimplifier::optimizeCall(CallInst *CI) {
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IRBuilder<> Builder(CI);
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bool isCallingConvC = CI->getCallingConv() == llvm::CallingConv::C;
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// Command-line parameter overrides function attribute.
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if (EnableUnsafeFPShrink.getNumOccurrences() > 0)
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UnsafeFPShrink = EnableUnsafeFPShrink;
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else if (Callee->hasFnAttribute("unsafe-fp-math")) {
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// FIXME: This is the same problem as described in optimizeSqrt().
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// If calls gain access to IR-level FMF, then use that instead of a
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// function attribute.
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// Check for unsafe-fp-math = true.
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Attribute Attr = Callee->getFnAttribute("unsafe-fp-math");
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if (Attr.getValueAsString() == "true")
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UnsafeFPShrink = true;
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}
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// Next check for intrinsics.
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if (IntrinsicInst *II = dyn_cast<IntrinsicInst>(CI)) {
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if (!isCallingConvC)
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@ -2182,11 +2203,10 @@ Value *LibCallSimplifier::optimizeCall(CallInst *CI) {
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}
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LibCallSimplifier::LibCallSimplifier(const DataLayout *DL,
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const TargetLibraryInfo *TLI,
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bool UnsafeFPShrink) :
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const TargetLibraryInfo *TLI) :
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DL(DL),
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TLI(TLI),
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UnsafeFPShrink(UnsafeFPShrink) {
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UnsafeFPShrink(false) {
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}
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void LibCallSimplifier::replaceAllUsesWith(Instruction *I, Value *With) const {
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@ -1,349 +1,353 @@
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; RUN: opt < %s -instcombine -enable-double-float-shrink -S | FileCheck %s
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; RUN: opt < %s -instcombine -S | FileCheck %s
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define float @acos_test(float %f) nounwind readnone {
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; CHECK: acos_test
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; Check for and against shrinkage when using the
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; unsafe-fp-math function attribute on a math lib
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; function. This optimization may be overridden by
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; the -enable-double-float-shrink option.
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; PR17850: http://llvm.org/bugs/show_bug.cgi?id=17850
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define float @acos_test(float %f) {
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%conv = fpext float %f to double
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%call = call double @acos(double %conv)
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%conv1 = fptrunc double %call to float
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ret float %conv1
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; CHECK-LABEL: acos_test
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; CHECK: call float @acosf(float %f)
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}
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define double @acos_test2(float %f) nounwind readnone {
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; CHECK: acos_test2
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define double @acos_test2(float %f) {
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%conv = fpext float %f to double
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%call = call double @acos(double %conv)
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ret double %call
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; CHECK-LABEL: acos_test2
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; CHECK: call double @acos(double %conv)
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}
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define float @acosh_test(float %f) nounwind readnone {
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; CHECK: acosh_test
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define float @acosh_test(float %f) {
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%conv = fpext float %f to double
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%call = call double @acosh(double %conv)
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%conv1 = fptrunc double %call to float
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ret float %conv1
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; CHECK-LABEL: acosh_test
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; CHECK: call float @acoshf(float %f)
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}
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define double @acosh_test2(float %f) nounwind readnone {
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; CHECK: acosh_test2
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define double @acosh_test2(float %f) {
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%conv = fpext float %f to double
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%call = call double @acosh(double %conv)
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ret double %call
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; CHECK-LABEL: acosh_test2
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; CHECK: call double @acosh(double %conv)
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}
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define float @asin_test(float %f) nounwind readnone {
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; CHECK: asin_test
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define float @asin_test(float %f) {
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%conv = fpext float %f to double
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%call = call double @asin(double %conv)
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%conv1 = fptrunc double %call to float
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ret float %conv1
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; CHECK-LABEL: asin_test
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; CHECK: call float @asinf(float %f)
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}
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define double @asin_test2(float %f) nounwind readnone {
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; CHECK: asin_test2
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define double @asin_test2(float %f) {
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%conv = fpext float %f to double
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%call = call double @asin(double %conv)
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ret double %call
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; CHECK-LABEL: asin_test2
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; CHECK: call double @asin(double %conv)
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}
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define float @asinh_test(float %f) nounwind readnone {
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; CHECK: asinh_test
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define float @asinh_test(float %f) {
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%conv = fpext float %f to double
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%call = call double @asinh(double %conv)
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%conv1 = fptrunc double %call to float
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ret float %conv1
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; CHECK-LABEL: asinh_test
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; CHECK: call float @asinhf(float %f)
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}
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define double @asinh_test2(float %f) nounwind readnone {
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; CHECK: asinh_test2
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define double @asinh_test2(float %f) {
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%conv = fpext float %f to double
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%call = call double @asinh(double %conv)
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ret double %call
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; CHECK-LABEL: asinh_test2
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; CHECK: call double @asinh(double %conv)
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}
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define float @atan_test(float %f) nounwind readnone {
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; CHECK: atan_test
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define float @atan_test(float %f) {
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%conv = fpext float %f to double
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%call = call double @atan(double %conv)
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%conv1 = fptrunc double %call to float
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ret float %conv1
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; CHECK-LABEL: atan_test
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; CHECK: call float @atanf(float %f)
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}
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define double @atan_test2(float %f) nounwind readnone {
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; CHECK: atan_test2
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define double @atan_test2(float %f) {
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%conv = fpext float %f to double
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%call = call double @atan(double %conv)
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ret double %call
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; CHECK-LABEL: atan_test2
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; CHECK: call double @atan(double %conv)
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}
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define float @atanh_test(float %f) nounwind readnone {
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; CHECK: atanh_test
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define float @atanh_test(float %f) {
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%conv = fpext float %f to double
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%call = call double @atanh(double %conv)
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%conv1 = fptrunc double %call to float
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ret float %conv1
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; CHECK-LABEL: atanh_test
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; CHECK: call float @atanhf(float %f)
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}
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define double @atanh_test2(float %f) nounwind readnone {
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; CHECK: atanh_test2
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define double @atanh_test2(float %f) {
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%conv = fpext float %f to double
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%call = call double @atanh(double %conv)
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ret double %call
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; CHECK-LABEL: atanh_test2
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; CHECK: call double @atanh(double %conv)
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}
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define float @cbrt_test(float %f) nounwind readnone {
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; CHECK: cbrt_test
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define float @cbrt_test(float %f) {
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%conv = fpext float %f to double
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%call = call double @cbrt(double %conv)
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%conv1 = fptrunc double %call to float
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ret float %conv1
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; CHECK-LABEL: cbrt_test
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; CHECK: call float @cbrtf(float %f)
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}
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define double @cbrt_test2(float %f) nounwind readnone {
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; CHECK: cbrt_test2
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define double @cbrt_test2(float %f) {
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%conv = fpext float %f to double
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%call = call double @cbrt(double %conv)
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ret double %call
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; CHECK-LABEL: cbrt_test2
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; CHECK: call double @cbrt(double %conv)
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}
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define float @exp_test(float %f) nounwind readnone {
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; CHECK: exp_test
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define float @exp_test(float %f) {
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%conv = fpext float %f to double
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%call = call double @exp(double %conv)
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%conv1 = fptrunc double %call to float
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ret float %conv1
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; CHECK-LABEL: exp_test
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; CHECK: call float @expf(float %f)
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}
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define double @exp_test2(float %f) nounwind readnone {
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; CHECK: exp_test2
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define double @exp_test2(float %f) {
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%conv = fpext float %f to double
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%call = call double @exp(double %conv)
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ret double %call
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; CHECK-LABEL: exp_test2
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; CHECK: call double @exp(double %conv)
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}
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define float @expm1_test(float %f) nounwind readnone {
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; CHECK: expm1_test
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define float @expm1_test(float %f) {
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%conv = fpext float %f to double
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%call = call double @expm1(double %conv)
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%conv1 = fptrunc double %call to float
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ret float %conv1
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; CHECK-LABEL: expm1_test
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; CHECK: call float @expm1f(float %f)
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}
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define double @expm1_test2(float %f) nounwind readnone {
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; CHECK: expm1_test2
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define double @expm1_test2(float %f) {
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%conv = fpext float %f to double
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%call = call double @expm1(double %conv)
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ret double %call
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; CHECK-LABEL: expm1_test2
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; CHECK: call double @expm1(double %conv)
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}
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define float @exp10_test(float %f) nounwind readnone {
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; CHECK: exp10_test
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define float @exp10_test(float %f) {
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%conv = fpext float %f to double
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%call = call double @exp10(double %conv)
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%conv1 = fptrunc double %call to float
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ret float %conv1
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; FIXME: Re-enable this when Linux allows transforming this again, or when we
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; can use builtin attributes to test the transform regardless of OS.
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; DISABLED-CHECK: call float @exp10f(float %f)
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; CHECK-LABEL: exp10_test
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; CHECK: call double @exp10(double %conv)
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}
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define double @exp10_test2(float %f) nounwind readnone {
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; CHECK: exp10_test2
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define double @exp10_test2(float %f) {
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%conv = fpext float %f to double
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%call = call double @exp10(double %conv)
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ret double %call
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; CHECK-LABEL: exp10_test2
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; CHECK: call double @exp10(double %conv)
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}
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define float @log_test(float %f) nounwind readnone {
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; CHECK: log_test
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define float @log_test(float %f) {
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%conv = fpext float %f to double
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%call = call double @log(double %conv)
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%conv1 = fptrunc double %call to float
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ret float %conv1
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; CHECK-LABEL: log_test
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; CHECK: call float @logf(float %f)
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}
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define double @log_test2(float %f) nounwind readnone {
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; CHECK: log_test2
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define double @log_test2(float %f) {
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%conv = fpext float %f to double
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%call = call double @log(double %conv)
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ret double %call
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; CHECK-LABEL: log_test2
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; CHECK: call double @log(double %conv)
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}
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define float @log10_test(float %f) nounwind readnone {
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; CHECK: log10_test
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define float @log10_test(float %f) {
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%conv = fpext float %f to double
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%call = call double @log10(double %conv)
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%conv1 = fptrunc double %call to float
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ret float %conv1
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; CHECK-LABEL: log10_test
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; CHECK: call float @log10f(float %f)
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}
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define double @log10_test2(float %f) nounwind readnone {
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; CHECK: log10_test2
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define double @log10_test2(float %f) {
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%conv = fpext float %f to double
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%call = call double @log10(double %conv)
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ret double %call
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; CHECK-LABEL: log10_test2
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; CHECK: call double @log10(double %conv)
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}
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define float @log1p_test(float %f) nounwind readnone {
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; CHECK: log1p_test
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define float @log1p_test(float %f) {
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%conv = fpext float %f to double
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%call = call double @log1p(double %conv)
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%conv1 = fptrunc double %call to float
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ret float %conv1
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; CHECK-LABEL: log1p_test
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; CHECK: call float @log1pf(float %f)
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}
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define double @log1p_test2(float %f) nounwind readnone {
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; CHECK: log1p_test2
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define double @log1p_test2(float %f) {
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%conv = fpext float %f to double
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%call = call double @log1p(double %conv)
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ret double %call
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; CHECK-LABEL: log1p_test2
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; CHECK: call double @log1p(double %conv)
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}
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define float @log2_test(float %f) nounwind readnone {
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; CHECK: log2_test
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define float @log2_test(float %f) {
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%conv = fpext float %f to double
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%call = call double @log2(double %conv)
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%conv1 = fptrunc double %call to float
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ret float %conv1
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; CHECK-LABEL: log2_test
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; CHECK: call float @log2f(float %f)
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}
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define double @log2_test2(float %f) nounwind readnone {
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; CHECK: log2_test2
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define double @log2_test2(float %f) {
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%conv = fpext float %f to double
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%call = call double @log2(double %conv)
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ret double %call
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; CHECK-LABEL: log2_test2
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; CHECK: call double @log2(double %conv)
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}
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define float @logb_test(float %f) nounwind readnone {
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; CHECK: logb_test
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define float @logb_test(float %f) {
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%conv = fpext float %f to double
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%call = call double @logb(double %conv)
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%conv1 = fptrunc double %call to float
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ret float %conv1
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; CHECK-LABEL: logb_test
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; CHECK: call float @logbf(float %f)
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}
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define double @logb_test2(float %f) nounwind readnone {
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; CHECK: logb_test2
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define double @logb_test2(float %f) {
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%conv = fpext float %f to double
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%call = call double @logb(double %conv)
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ret double %call
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; CHECK-LABEL: logb_test2
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; CHECK: call double @logb(double %conv)
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}
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define float @sin_test(float %f) nounwind readnone {
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; CHECK: sin_test
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define float @sin_test(float %f) {
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%conv = fpext float %f to double
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%call = call double @sin(double %conv)
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%conv1 = fptrunc double %call to float
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ret float %conv1
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; CHECK-LABEL: sin_test
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; CHECK: call float @sinf(float %f)
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}
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define double @sin_test2(float %f) nounwind readnone {
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||||
; CHECK: sin_test2
|
||||
define double @sin_test2(float %f) {
|
||||
%conv = fpext float %f to double
|
||||
%call = call double @sin(double %conv)
|
||||
ret double %call
|
||||
; CHECK-LABEL: sin_test2
|
||||
; CHECK: call double @sin(double %conv)
|
||||
}
|
||||
|
||||
define float @sqrt_test(float %f) nounwind readnone {
|
||||
; CHECK: sqrt_test
|
||||
define float @sqrt_test(float %f) {
|
||||
%conv = fpext float %f to double
|
||||
%call = call double @sqrt(double %conv)
|
||||
%conv1 = fptrunc double %call to float
|
||||
ret float %conv1
|
||||
; CHECK-LABEL: sqrt_test
|
||||
; CHECK: call float @sqrtf(float %f)
|
||||
}
|
||||
|
||||
define float @sqrt_int_test(float %f) nounwind readnone {
|
||||
; CHECK: sqrt_int_test
|
||||
define float @sqrt_int_test(float %f) {
|
||||
%conv = fpext float %f to double
|
||||
%call = call double @llvm.sqrt.f64(double %conv)
|
||||
%conv1 = fptrunc double %call to float
|
||||
ret float %conv1
|
||||
; CHECK-LABEL: sqrt_int_test
|
||||
; CHECK: call float @llvm.sqrt.f32(float %f)
|
||||
}
|
||||
|
||||
define double @sqrt_test2(float %f) nounwind readnone {
|
||||
; CHECK: sqrt_test2
|
||||
define double @sqrt_test2(float %f) {
|
||||
%conv = fpext float %f to double
|
||||
%call = call double @sqrt(double %conv)
|
||||
ret double %call
|
||||
; CHECK-LABEL: sqrt_test2
|
||||
; CHECK: call double @sqrt(double %conv)
|
||||
}
|
||||
define float @tan_test(float %f) nounwind readnone {
|
||||
; CHECK: tan_test
|
||||
define float @tan_test(float %f) {
|
||||
%conv = fpext float %f to double
|
||||
%call = call double @tan(double %conv)
|
||||
%conv1 = fptrunc double %call to float
|
||||
ret float %conv1
|
||||
; CHECK-LABEL: tan_test
|
||||
; CHECK: call float @tanf(float %f)
|
||||
}
|
||||
|
||||
define double @tan_test2(float %f) nounwind readnone {
|
||||
; CHECK: tan_test2
|
||||
define double @tan_test2(float %f) {
|
||||
%conv = fpext float %f to double
|
||||
%call = call double @tan(double %conv)
|
||||
ret double %call
|
||||
; CHECK-LABEL: tan_test2
|
||||
; CHECK: call double @tan(double %conv)
|
||||
}
|
||||
define float @tanh_test(float %f) nounwind readnone {
|
||||
; CHECK: tanh_test
|
||||
define float @tanh_test(float %f) {
|
||||
%conv = fpext float %f to double
|
||||
%call = call double @tanh(double %conv)
|
||||
%conv1 = fptrunc double %call to float
|
||||
ret float %conv1
|
||||
; CHECK-LABEL: tanh_test
|
||||
; CHECK: call float @tanhf(float %f)
|
||||
}
|
||||
|
||||
define double @tanh_test2(float %f) nounwind readnone {
|
||||
; CHECK: tanh_test2
|
||||
define double @tanh_test2(float %f) {
|
||||
%conv = fpext float %f to double
|
||||
%call = call double @tanh(double %conv)
|
||||
ret double %call
|
||||
; CHECK-LABEL: tanh_test2
|
||||
; CHECK: call double @tanh(double %conv)
|
||||
}
|
||||
|
||||
declare double @tanh(double) nounwind readnone
|
||||
declare double @tan(double) nounwind readnone
|
||||
declare double @sqrt(double) nounwind readnone
|
||||
declare double @sin(double) nounwind readnone
|
||||
declare double @log2(double) nounwind readnone
|
||||
declare double @log1p(double) nounwind readnone
|
||||
declare double @log10(double) nounwind readnone
|
||||
declare double @log(double) nounwind readnone
|
||||
declare double @logb(double) nounwind readnone
|
||||
declare double @exp10(double) nounwind readnone
|
||||
declare double @expm1(double) nounwind readnone
|
||||
declare double @exp(double) nounwind readnone
|
||||
declare double @cbrt(double) nounwind readnone
|
||||
declare double @atanh(double) nounwind readnone
|
||||
declare double @atan(double) nounwind readnone
|
||||
declare double @acos(double) nounwind readnone
|
||||
declare double @acosh(double) nounwind readnone
|
||||
declare double @asin(double) nounwind readnone
|
||||
declare double @asinh(double) nounwind readnone
|
||||
declare double @tanh(double) #1
|
||||
declare double @tan(double) #1
|
||||
declare double @sqrt(double) #1
|
||||
declare double @sin(double) #1
|
||||
declare double @log2(double) #1
|
||||
declare double @log1p(double) #1
|
||||
declare double @log10(double) #1
|
||||
declare double @log(double) #1
|
||||
declare double @logb(double) #1
|
||||
declare double @exp10(double) #1
|
||||
declare double @expm1(double) #1
|
||||
declare double @exp(double) #1
|
||||
declare double @cbrt(double) #1
|
||||
declare double @atanh(double) #1
|
||||
declare double @atan(double) #1
|
||||
declare double @acos(double) #1
|
||||
declare double @acosh(double) #1
|
||||
declare double @asin(double) #1
|
||||
declare double @asinh(double) #1
|
||||
|
||||
declare double @llvm.sqrt.f64(double) nounwind readnone
|
||||
declare double @llvm.sqrt.f64(double) #1
|
||||
attributes #1 = { "unsafe-fp-math"="true" }
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user