http://llvm.org/bugs/show_bug.cgi?id=4403
Summary: clang x86-64 ABI doesn't set alignment correctly for
byval struct containing SSE vector
Product: clang
Version: unspecified
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: LLVM Codegen
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Testcase:
#include <emmintrin.h>
struct x {__m128 x,y,z;};
__m128 a(int a, int b, int c, int d, int e, int f, int g, struct x x) { return
x.x; }
The -emit-llvm output doesn't set the alignment for argument x, and as a result
the -S result contains an misaligned load.
r73306 is the parallel fix for x86-32; I think that the code for x86-64 should
be doing something similar.
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