Also, add tests to verify that we're checking 'fast' on both calls of each transform pair,
tighten the CHECK lines, and give the tests more meaningful names.
This is a continuation of:
http://reviews.llvm.org/rL255555
http://reviews.llvm.org/rL256871
http://reviews.llvm.org/rL256964
http://reviews.llvm.org/rL257400
http://reviews.llvm.org/rL257404
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@257414
91177308-0d34-0410-b5e6-
96231b3b80d8
!FT->getParamType(0)->isFloatingPointTy())
return Ret;
!FT->getParamType(0)->isFloatingPointTy())
return Ret;
- if (!canUseUnsafeFPMath(CI->getParent()->getParent()))
+ if (!CI->hasUnsafeAlgebra())
return Ret;
Value *Op1 = CI->getArgOperand(0);
auto *OpC = dyn_cast<CallInst>(Op1);
return Ret;
Value *Op1 = CI->getArgOperand(0);
auto *OpC = dyn_cast<CallInst>(Op1);
+
+ // The earlier call must also be unsafe in order to do these transforms.
+ if (!OpC || !OpC->hasUnsafeAlgebra())
return Ret;
// log(pow(x,y)) -> y*log(x)
return Ret;
// log(pow(x,y)) -> y*log(x)
; RUN: opt < %s -instcombine -S | FileCheck %s
; RUN: opt < %s -instcombine -S | FileCheck %s
-define double @mylog(double %x, double %y) #0 {
-entry:
+define double @log_pow(double %x, double %y) {
+ %pow = call fast double @llvm.pow.f64(double %x, double %y)
+ %call = call fast double @log(double %pow)
+ ret double %call
+}
+
+; CHECK-LABEL: define double @log_pow(
+; CHECK-NEXT: %log = call fast double @log(double %x)
+; CHECK-NEXT: %mul = fmul fast double %log, %y
+; CHECK-NEXT: ret double %mul
+
+define double @log_pow_not_fast(double %x, double %y) {
%pow = call double @llvm.pow.f64(double %x, double %y)
%pow = call double @llvm.pow.f64(double %x, double %y)
- %call = call double @log(double %pow) #0
+ %call = call fast double @log(double %pow)
-; CHECK-LABEL: define double @mylog(
-; CHECK: %log = call fast double @log(double %x) #0
-; CHECK: %mul = fmul fast double %log, %y
-; CHECK: ret double %mul
-; CHECK: }
+; CHECK-LABEL: define double @log_pow_not_fast(
+; CHECK-NEXT: %pow = call double @llvm.pow.f64(double %x, double %y)
+; CHECK-NEXT: %call = call fast double @log(double %pow)
+; CHECK-NEXT: ret double %call
-define double @test2(double ()* %fptr, double %p1) #0 {
+define double @function_pointer(double ()* %fptr, double %p1) {
%call1 = call double %fptr()
%pow = call double @log(double %call1)
ret double %pow
}
%call1 = call double %fptr()
%pow = call double @log(double %call1)
ret double %pow
}
-; CHECK-LABEL: @test2
-; CHECK: log
+; CHECK-LABEL: @function_pointer
+; CHECK-NEXT: %call1 = call double %fptr()
+; CHECK-NEXT: %pow = call double @log(double %call1)
+; CHECK-NEXT: ret double %pow
+
+define double @log_exp2(double %x) {
+ %call2 = call fast double @exp2(double %x)
+ %call3 = call fast double @log(double %call2)
+ ret double %call3
+}
+
+; CHECK-LABEL: @log_exp2
+; CHECK-NEXT: %call2 = call fast double @exp2(double %x)
+; CHECK-NEXT: %logmul = fmul fast double %x, 0x3FE62E42FEFA39EF
+; CHECK-NEXT: ret double %logmul
-define double @test3(double %x) #0 {
- %call2 = call double @exp2(double %x) #0
- %call3 = call double @log(double %call2) #0
+define double @log_exp2_not_fast(double %x) {
+ %call2 = call double @exp2(double %x)
+ %call3 = call fast double @log(double %call2)
-; CHECK-LABEL: @test3
-; CHECK: %call2 = call double @exp2(double %x) #0
-; CHECK: %logmul = fmul fast double %x, 0x3FE62E42FEFA39EF
-; CHECK: ret double %logmul
-; CHECK: }
+; CHECK-LABEL: @log_exp2_not_fast
+; CHECK-NEXT: %call2 = call double @exp2(double %x)
+; CHECK-NEXT: %call3 = call fast double @log(double %call2)
+; CHECK-NEXT: ret double %call3
-declare double @log(double) #0
-declare double @exp2(double) #0
+declare double @log(double)
+declare double @exp2(double)
declare double @llvm.pow.f64(double, double)
declare double @llvm.pow.f64(double, double)
-attributes #0 = { "unsafe-fp-math"="true" }