llvm-6502/test/Transforms/InstCombine/pow-2.ll
Meador Inge 2920a71663 instcombine: Migrate math library call simplifications
This patch migrates the math library call simplifications from the
simplify-libcalls pass into the instcombine library call simplifier.

I have typically migrated just one simplifier at a time, but the math
simplifiers are interdependent because:

   1. CosOpt, PowOpt, and Exp2Opt all depend on UnaryDoubleFPOpt.
   2. CosOpt, PowOpt, Exp2Opt, and UnaryDoubleFPOpt all depend on
      the option -enable-double-float-shrink.

These two factors made migrating each of these simplifiers individually
more of a pain than it would be worth.  So, I migrated them all together.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167815 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-13 04:16:17 +00:00

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LLVM

; Test that the pow library call simplifier works correctly.
;
; RUN: opt < %s -instcombine -S | FileCheck %s
declare float @pow(double, double)
; Check that pow functions with the wrong prototype aren't simplified.
define float @test_no_simplify1(double %x) {
; CHECK: @test_no_simplify1
%retval = call float @pow(double 1.0, double %x)
; CHECK-NEXT: call float @pow(double 1.000000e+00, double %x)
ret float %retval
}