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instcombine: Migrate isdigit optimizations

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This patch migrates the isdigit optimizations from the simplify-libcalls
pass into the instcombine library call simplifier.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168578 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Meador Inge
2012-11-26 02:31:59 +00:00
parent d6a93075a1
commit a0798ec377
4 changed files with 67 additions and 42 deletions
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test/Transforms/SimplifyLibCalls/IsDigit.ll
-21
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@@ -1,21 +0,0 @@
; Test that the IsDigitOptimizer works correctly
; RUN: opt < %s -simplify-libcalls -S | \
; RUN: not grep call
declare i32 @isdigit(i32)
declare i32 @isascii(i32)
define i32 @main() {
%val1 = call i32 @isdigit( i32 47 ) ; <i32> [#uses=1]
%val2 = call i32 @isdigit( i32 48 ) ; <i32> [#uses=1]
%val3 = call i32 @isdigit( i32 57 ) ; <i32> [#uses=1]
%val4 = call i32 @isdigit( i32 58 ) ; <i32> [#uses=1]
%rslt1 = add i32 %val1, %val2 ; <i32> [#uses=1]
%rslt2 = add i32 %val3, %val4 ; <i32> [#uses=1]
%sum = add i32 %rslt1, %rslt2 ; <i32> [#uses=1]
%rslt = call i32 @isdigit( i32 %sum ) ; <i32> [#uses=1]
%tmp = call i32 @isascii( i32 %rslt ) ; <i32> [#uses=1]
ret i32 %tmp
}