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6e84f48cd8
exact/nsw/nuw shifts and have instcombine infer them when it can prove that the relevant properties are true for a given shift without them. Also, a variety of refactoring to use the new patternmatch logic thrown in for good luck. I believe that this takes care of a bunch of related code quality issues attached to PR8862. llvm-svn: 125267
36 lines
1.2 KiB
LLVM
36 lines
1.2 KiB
LLVM
; PR1271
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; RUN: opt < %s -instcombine -S | \
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; RUN: grep {ashr exact i32 %.mp137, 2}
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64"
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target triple = "i686-pc-linux-gnu"
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define i1 @test(i32* %tmp141, i32* %tmp145,
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i32 %b8, i32 %iftmp.430.0, i32* %tmp134.out, i32* %tmp137.out)
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{
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newFuncRoot:
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%tmp133 = and i32 %b8, 1 ; <i32> [#uses=1]
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%tmp134 = shl i32 %tmp133, 3 ; <i32> [#uses=3]
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%tmp136 = ashr i32 %b8, 1 ; <i32> [#uses=1]
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%tmp137 = shl i32 %tmp136, 3 ; <i32> [#uses=3]
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%tmp139 = ashr i32 %tmp134, 2 ; <i32> [#uses=1]
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store i32 %tmp139, i32* %tmp141
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%tmp143 = ashr i32 %tmp137, 2 ; <i32> [#uses=1]
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store i32 %tmp143, i32* %tmp145
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icmp eq i32 %iftmp.430.0, 0 ; <i1>:0 [#uses=1]
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zext i1 %0 to i8 ; <i8>:1 [#uses=1]
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icmp ne i8 %1, 0 ; <i1>:2 [#uses=1]
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br i1 %2, label %cond_true147.exitStub, label %cond_false252.exitStub
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cond_true147.exitStub: ; preds = %newFuncRoot
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store i32 %tmp134, i32* %tmp134.out
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store i32 %tmp137, i32* %tmp137.out
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ret i1 true
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cond_false252.exitStub: ; preds = %newFuncRoot
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store i32 %tmp134, i32* %tmp134.out
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store i32 %tmp137, i32* %tmp137.out
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ret i1 false
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}
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