fc4b0fe0a2
We now, from clang, can turn arrays of
static short g_data[] = {16, 16, 16, 16, 16, 16, 16, 16, 0, 0, 0, 0, 0, 0, 0, 0};
into structs of the form
@g_data = internal global <{ [8 x i16], [8 x i16] }> ...
GlobalOpt will incorrectly SROA it, not realising that the access to the first
element may overflow into the second. This fixes it by checking geps more
thoroughly.
I believe this makes the globalsra-partial.ll test case invalid as the %i value
could be out of bounds. I've re-purposed it as a negative test for this case.
Differential Revision: https://reviews.llvm.org/D49816
llvm-svn: 338192
26 lines
1.0 KiB
LLVM
26 lines
1.0 KiB
LLVM
; In this case, the global cannot be merged as i may be out of range
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; RUN: opt < %s -globalopt -S | FileCheck %s
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target datalayout = "E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128"
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@G = internal global { i32, [4 x float] } zeroinitializer ; <{ i32, [4 x float] }*> [#uses=3]
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; CHECK: @G = internal unnamed_addr global { i32, [4 x float] }
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; CHECK: 12345
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define void @onlystore() {
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store i32 12345, i32* getelementptr ({ i32, [4 x float] }, { i32, [4 x float] }* @G, i32 0, i32 0)
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ret void
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}
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define void @storeinit(i32 %i) {
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%Ptr = getelementptr { i32, [4 x float] }, { i32, [4 x float] }* @G, i32 0, i32 1, i32 %i ; <float*> [#uses=1]
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store float 1.000000e+00, float* %Ptr
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ret void
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}
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define float @readval(i32 %i) {
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%Ptr = getelementptr { i32, [4 x float] }, { i32, [4 x float] }* @G, i32 0, i32 1, i32 %i ; <float*> [#uses=1]
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%V = load float, float* %Ptr ; <float> [#uses=1]
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ret float %V
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}
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