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15ae77989b
Previously we would refrain from attempting to increase the linkage of available_externally globals because they were considered weak for the linker. Now they are treated more like a declaration instead of a weak definition. This was causing SSE alignment faults in Chromuim, when some code assumed it could increase the alignment of a dllimported global that it didn't control. http://crbug.com/509256 llvm-svn: 242091
42 lines
1.0 KiB
LLVM
42 lines
1.0 KiB
LLVM
; RUN: opt < %s -instcombine -S | FileCheck %s
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; Don't assume that external global variables or those with weak linkage have
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; their preferred alignment. They may only have the ABI minimum alignment.
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target datalayout = "i32:8:32"
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@A = external global i32
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@B = weak_odr global i32 0
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@C = available_externally global <4 x i32> zeroinitializer, align 4
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; CHECK: @C = available_externally global <4 x i32> zeroinitializer, align 4
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define i64 @foo(i64 %a) {
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%t = ptrtoint i32* @A to i64
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%s = shl i64 %a, 3
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%r = or i64 %t, %s
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%q = add i64 %r, 1
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ret i64 %q
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}
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; CHECK-LABEL: define i64 @foo(i64 %a)
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; CHECK: %s = shl i64 %a, 3
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; CHECK: %r = or i64 %s, ptrtoint (i32* @A to i64)
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; CHECK: %q = add i64 %r, 1
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; CHECK: ret i64 %q
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define i32 @bar() {
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%r = load i32, i32* @B, align 1
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ret i32 %r
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}
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; CHECK-LABEL: @bar()
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; CHECK: align 1
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define void @vec_store() {
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store <4 x i32> <i32 0, i32 1, i32 2, i32 3>, <4 x i32>* @C, align 4
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ret void
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}
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; CHECK: define void @vec_store()
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; CHECK: store <4 x i32> <i32 0, i32 1, i32 2, i32 3>, <4 x i32>* @C, align 4
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