forked from OSchip/llvm-project
79 lines
2.6 KiB
LLVM
79 lines
2.6 KiB
LLVM
; XFAIL: *
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;; NewGVN zaps the strlens, but currently takes two iterations to evaluate the conditions, because
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;; we prune predicateinfo, and the icmps only become equivalent after the strlens are zapped
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; Two occurrences of strlen should be zapped.
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; RUN: opt < %s -basic-aa -newgvn -S | FileCheck %s
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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-f80:128:128"
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target triple = "i386-apple-darwin9"
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define i32 @test(i32 %g, i8* %P) nounwind {
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entry:
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%tmp2 = call i32 @strlen( i8* %P ) nounwind readonly ; <i32> [#uses=1]
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%tmp3 = icmp eq i32 %tmp2, 100 ; <i1> [#uses=1]
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%tmp34 = zext i1 %tmp3 to i8 ; <i8> [#uses=1]
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%toBool = icmp ne i8 %tmp34, 0 ; <i1> [#uses=1]
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br i1 %toBool, label %bb, label %bb6
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bb: ; preds = %entry
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br label %bb27
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bb6: ; preds = %entry
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%tmp8 = add i32 %g, 42 ; <i32> [#uses=2]
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%tmp10 = call i32 @strlen( i8* %P ) nounwind readonly ; <i32> [#uses=1]
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%tmp11 = icmp eq i32 %tmp10, 100 ; <i1> [#uses=1]
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%tmp1112 = zext i1 %tmp11 to i8 ; <i8> [#uses=1]
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%toBool13 = icmp ne i8 %tmp1112, 0 ; <i1> [#uses=1]
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br i1 %toBool13, label %bb14, label %bb16
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bb14: ; preds = %bb6
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br label %bb27
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bb16: ; preds = %bb6
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%tmp18 = mul i32 %tmp8, 2 ; <i32> [#uses=1]
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%tmp20 = call i32 @strlen( i8* %P ) nounwind readonly ; <i32> [#uses=1]
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%tmp21 = icmp eq i32 %tmp20, 100 ; <i1> [#uses=1]
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%tmp2122 = zext i1 %tmp21 to i8 ; <i8> [#uses=1]
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%toBool23 = icmp ne i8 %tmp2122, 0 ; <i1> [#uses=1]
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br i1 %toBool23, label %bb24, label %bb26
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bb24: ; preds = %bb16
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br label %bb27
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bb26: ; preds = %bb16
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br label %bb27
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bb27: ; preds = %bb26, %bb24, %bb14, %bb
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%tmp.0 = phi i32 [ 11, %bb26 ], [ %tmp18, %bb24 ], [ %tmp8, %bb14 ], [ %g, %bb ] ; <i32> [#uses=1]
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br label %return
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return: ; preds = %bb27
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ret i32 %tmp.0
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}
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; CHECK: define i32 @test(i32 %g, i8* %P) #0 {
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; CHECK: entry:
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; CHECK: %tmp2 = call i32 @strlen(i8* %P) #1
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; CHECK: %tmp3 = icmp eq i32 %tmp2, 100
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; CHECK: %tmp34 = zext i1 %tmp3 to i8
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; CHECK: br i1 %tmp3, label %bb, label %bb6
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; CHECK: bb:
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; CHECK: br label %bb27
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; CHECK: bb6:
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; CHECK: %tmp8 = add i32 %g, 42
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; CHECK: br i1 false, label %bb14, label %bb16
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; CHECK: bb14:
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; CHECK: br label %bb27
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; CHECK: bb16:
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; CHECK: %tmp18 = mul i32 %tmp8, 2
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; CHECK: br i1 false, label %bb24, label %bb26
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; CHECK: bb24:
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; CHECK: br label %bb27
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; CHECK: bb26:
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; CHECK: br label %bb27
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; CHECK: bb27:
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; CHECK: %tmp.0 = phi i32 [ 11, %bb26 ], [ undef, %bb24 ], [ undef, %bb14 ], [ %g, %bb ]
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; CHECK: ret i32 %tmp.0
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; CHECK: }
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declare i32 @strlen(i8*) nounwind readonly
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