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SROA: Avoid struct and array types early to avoid creating an overly large integer type.

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Fixes PR14465.

Differential Revision: http://llvm-reviews.chandlerc.com/D148

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169084 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer
2012-12-01 11:53:32 +00:00
parent efcdb2944b
commit 5bded7525b
2 changed files with 16 additions and 0 deletions
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13
test/Transforms/SROA/basictest.ll
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@@ -1134,3 +1134,16 @@ entry:
ret void
; CHECK: ret
}
define void @PR14465() {
; Ensure that we don't crash when analyzing a alloca larger than the maximum
; integer type width (MAX_INT_BITS) supported by llvm (1048576*32 > (1<<23)-1).
; CHECK: @PR14465
%stack = alloca [1048576 x i32], align 16
; CHECK: alloca [1048576 x i32]
%cast = bitcast [1048576 x i32]* %stack to i8*
call void @llvm.memset.p0i8.i64(i8* %cast, i8 -2, i64 4194304, i32 16, i1 false)
ret void
; CHECK: ret
}