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many cleanups to the pow optimizer. Allow it to handle powf,

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add support for  pow(x, 2.0) -> x*x.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49411 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2008-04-09 00:07:45 +00:00
parent def286408f
commit 77d00b0cea
2 changed files with 62 additions and 38 deletions
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test/Transforms/SimplifyLibCalls/Pow.ll
+12 -4
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@@ -1,11 +1,10 @@
; Testcase for calls to the standard C "pow" function
;
; Equivalent to: http://gcc.gnu.org/ml/gcc-patches/2003-02/msg01786.html
; RUN: llvm-as < %s | opt -simplify-libcalls | llvm-dis | \
; RUN: not grep {call double .pow}
; END.
; RUN: llvm-as < %s | opt -simplify-libcalls | llvm-dis | not grep {call .pow}
declare double @pow(double, double)
declare float @powf(float, float)
define double @test1(double %X) {
%Y = call double @pow( double %X, double 0.000000e+00 ) ; <double> [#uses=1]
@@ -22,3 +21,12 @@ define double @test3(double %X) {
ret double %Y
}
define double @test4(double %X) {
%Y = call double @pow( double %X, double 2.0)
ret double %Y
}
define float @test4f(float %X) {
%Y = call float @powf( float %X, float 2.0)
ret float %Y
}