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Diffstat (limited to 'test/Transforms/SimplifyCFG/2008-07-13-InfLoopMiscompile.ll')
| -rw-r--r-- | test/Transforms/SimplifyCFG/2008-07-13-InfLoopMiscompile.ll | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/test/Transforms/SimplifyCFG/2008-07-13-InfLoopMiscompile.ll b/test/Transforms/SimplifyCFG/2008-07-13-InfLoopMiscompile.ll new file mode 100644 index 000000000000..0678e20ed4af --- /dev/null +++ b/test/Transforms/SimplifyCFG/2008-07-13-InfLoopMiscompile.ll @@ -0,0 +1,36 @@ +; RUN: llvm-as < %s | opt -simplifycfg | llvm-dis | grep {%outval = phi i32 .*mux} +; PR2540 +; Outval should end up with a select from 0/2, not all constants. + +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-f80:32:32" +target triple = "i386-pc-linux-gnu" +@g_37 = common global i32 0 ; <i32*> [#uses=1] +@.str = internal constant [4 x i8] c"%d\0A\00" ; <[4 x i8]*> [#uses=1] + +define i32 @main() nounwind { +entry: + %l = load i32* @g_37, align 4 ; <i32> [#uses=1] + %cmpa = icmp ne i32 %l, 0 ; <i1> [#uses=3] + br i1 %cmpa, label %func_1.exit, label %mooseblock + +mooseblock: ; preds = %entry + %cmpb = icmp eq i1 %cmpa, false ; <i1> [#uses=2] + br i1 %cmpb, label %monkeyblock, label %beeblock + +monkeyblock: ; preds = %monkeyblock, %mooseblock + br i1 %cmpb, label %cowblock, label %monkeyblock + +beeblock: ; preds = %beeblock, %mooseblock + br i1 %cmpa, label %cowblock, label %beeblock + +cowblock: ; preds = %beeblock, %monkeyblock + %cowval = phi i32 [ 2, %beeblock ], [ 0, %monkeyblock ] ; <i32> [#uses=1] + br label %func_1.exit + +func_1.exit: ; preds = %cowblock, %entry + %outval = phi i32 [ %cowval, %cowblock ], [ 1, %entry ] ; <i32> [#uses=1] + %pout = tail call i32 (i8*, ...)* @printf( i8* noalias getelementptr ([4 x i8]* @.str, i32 0, i32 0), i32 %outval ) nounwind ; <i32> [#uses=0] + ret i32 0 +} + +declare i32 @printf(i8*, ...) nounwind |