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| author | Owen Anderson <resistor@mac.com> | 2008-02-26 23:06:17 +0000 |
|---|---|---|
| committer | Owen Anderson <resistor@mac.com> | 2008-02-26 23:06:17 +0000 |
| commit | 77db50f68f9fa5cade9f3a368af4722a76e0c8c5 (patch) | |
| tree | 3308cf7c15ff6f1cc0dca5d0e385bb53f43efcc4 /test/Transforms/GVN | |
| parent | 8e50760dfe28ac1acd595895c965eead98a7d3df (diff) | |
| download | external_llvm-77db50f68f9fa5cade9f3a368af4722a76e0c8c5.zip external_llvm-77db50f68f9fa5cade9f3a368af4722a76e0c8c5.tar.gz external_llvm-77db50f68f9fa5cade9f3a368af4722a76e0c8c5.tar.bz2 | |
Fix an issue where GVN had the sizes of the two memcpy's reverse, resulting
in an invalid transformation.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47639 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/GVN')
| -rw-r--r-- | test/Transforms/GVN/2008-02-26-MemCpySize.ll | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/test/Transforms/GVN/2008-02-26-MemCpySize.ll b/test/Transforms/GVN/2008-02-26-MemCpySize.ll new file mode 100644 index 0000000..a82a193 --- /dev/null +++ b/test/Transforms/GVN/2008-02-26-MemCpySize.ll @@ -0,0 +1,45 @@ +; RUN: llvm-as < %s | opt -gvn -dse | llvm-dis | grep {call.*memcpy.*cell} | count 2 + +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" +target triple = "i686-apple-darwin9" + %struct.s = type { [11 x i8], i32 } +@.str = internal constant [11 x i8] c"0123456789\00" ; <[11 x i8]*> [#uses=1] +@cell = weak global %struct.s zeroinitializer ; <%struct.s*> [#uses=2] + +declare i32 @check(%struct.s* byval %p) nounwind + +declare i32 @strcmp(i8*, i8*) nounwind readonly + +define i32 @main() noreturn nounwind { +entry: + %p = alloca %struct.s, align 8 ; <%struct.s*> [#uses=2] + store i32 99, i32* getelementptr (%struct.s* @cell, i32 0, i32 1), align 4 + call void @llvm.memcpy.i32( i8* getelementptr (%struct.s* @cell, i32 0, i32 0, i32 0), i8* getelementptr ([11 x i8]* @.str, i32 0, i32 0), i32 11, i32 1 ) + %tmp = getelementptr %struct.s* %p, i32 0, i32 0, i32 0 ; <i8*> [#uses=2] + call void @llvm.memcpy.i64( i8* %tmp, i8* getelementptr (%struct.s* @cell, i32 0, i32 0, i32 0), i64 16, i32 8 ) + %tmp1.i = getelementptr %struct.s* %p, i32 0, i32 1 ; <i32*> [#uses=1] + %tmp2.i = load i32* %tmp1.i, align 4 ; <i32> [#uses=1] + %tmp3.i = icmp eq i32 %tmp2.i, 99 ; <i1> [#uses=1] + br i1 %tmp3.i, label %bb5.i, label %bb + +bb5.i: ; preds = %entry + %tmp91.i = call i32 @strcmp( i8* %tmp, i8* getelementptr ([11 x i8]* @.str, i32 0, i32 0) ) nounwind readonly ; <i32> [#uses=1] + %tmp53 = icmp eq i32 %tmp91.i, 0 ; <i1> [#uses=1] + br i1 %tmp53, label %bb7, label %bb + +bb: ; preds = %bb5.i, %entry + call void @abort( ) noreturn nounwind + unreachable + +bb7: ; preds = %bb5.i + call void @exit( i32 0 ) noreturn nounwind + unreachable +} + +declare void @llvm.memcpy.i32(i8*, i8*, i32, i32) nounwind + +declare void @abort() noreturn nounwind + +declare void @exit(i32) noreturn nounwind + +declare void @llvm.memcpy.i64(i8*, i8*, i64, i32) nounwind |