b7c0452a9a
Add `f64:32:64` to the data layout for AIX, to indicate that doubles have a 32-bit ABI alignment and 64-bit preferred alignment. Clang was already taking this into account, but it was not reflected in LLVM's data layout. A notable effect of this change is that `double` loads/stores with 4 byte alignment are no longer considered "unaligned" and avoid the corresponding unaligned access legalization. I assume that this is correct/desired for AIX. (The codegen previously already relied on this in some places related to the call ABI simply by dint of assuming certain stack locations were 8 byte aligned, even though they were only actually 4 byte aligned.) Fixes https://github.com/llvm/llvm-project/issues/133599.
16 lines
388 B
C
16 lines
388 B
C
// PR 1278
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// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu %s -emit-llvm -o - | FileCheck %s
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// RUN: %clang_cc1 -triple powerpc64-ibm-aix %s -emit-llvm -o - | FileCheck %s --check-prefix=AIX
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// CHECK: %struct.s = type { double, i32 }
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// AIX: %struct.s = type { double, i32, [4 x i8] }
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struct s {
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double d1;
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int s1;
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};
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struct s foo(void) {
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struct s S = {1.1, 2};
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return S;
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}
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