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| -rw-r--r-- | test/Transforms/InstCombine/2007-04-04-BadFoldBitcastIntoMalloc.ll | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/2007-04-04-BadFoldBitcastIntoMalloc.ll b/test/Transforms/InstCombine/2007-04-04-BadFoldBitcastIntoMalloc.ll new file mode 100644 index 0000000000..335f318c64 --- /dev/null +++ b/test/Transforms/InstCombine/2007-04-04-BadFoldBitcastIntoMalloc.ll @@ -0,0 +1,19 @@ +; In the presence of a negative offset (the -8 below), a fold of a bitcast into +; a malloc messes up the element count, causing an extra 4GB to be allocated on +; 64-bit targets. +; +; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep -v '= add i32' + +target datalayout = "e-p:64:64:64-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" +target triple = "x86_64-unknown-freebsd6.2" + +define i1 @test(i32 %tmp141, double** %tmp145) +{ + %tmp133 = add i32 %tmp141, 1 + %tmp134 = shl i32 %tmp133, 3 + %tmp135 = add i32 %tmp134, -8 + %tmp136 = malloc i8, i32 %tmp135 + %tmp137 = bitcast i8* %tmp136 to double* + store double* %tmp137, double** %tmp145 + ret i1 false +} |