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llvm-project/llvm/test/CodeGen/X86/dont-trunc-store-double-to-...

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Set trunc store action to Expand for all X86 targets. When compiling without SSE2, isTruncStoreLegal(F64, F32) would return Legal, whereas with SSE2 it would return Expand. And since the Target doesn't seem to actually handle a truncstore for double -> float, it would just output a store of a full double in the space for a float hence overwriting other bits on the stack. Patch by Luqman Aden! llvm-svn: 217410
2014-09-09 09:13:36 +08:00
; RUN: llc -march=x86 < %s | FileCheck %s
; CHECK-LABEL: @bar
; CHECK: movl $1074339512,
; CHECK: movl $1374389535,
; CHECK: movl $1078523331,
define void @bar() unnamed_addr {
entry-block:
%a = alloca double
%b = alloca float
store double 3.140000e+00, double* %a
[opaque pointer type] Add textual IR support for explicit type parameter to load instruction Essentially the same as the GEP change in r230786. A similar migration script can be used to update test cases, though a few more test case improvements/changes were required this time around: (r229269-r229278) import fileinput import sys import re pat = re.compile(r"((?:=|:|^)\s*load (?:atomic )?(?:volatile )?(.*?))(| addrspace\(\d+\) *)\*($| *(?:%|@|null|undef|blockaddress|getelementptr|addrspacecast|bitcast|inttoptr|\[\[[a-zA-Z]|\{\{).*$)") for line in sys.stdin: sys.stdout.write(re.sub(pat, r"\1, \2\3*\4", line)) Reviewers: rafael, dexonsmith, grosser Differential Revision: http://reviews.llvm.org/D7649 llvm-svn: 230794
2015-02-28 05:17:42 +08:00
%0 = load double, double* %a
Set trunc store action to Expand for all X86 targets. When compiling without SSE2, isTruncStoreLegal(F64, F32) would return Legal, whereas with SSE2 it would return Expand. And since the Target doesn't seem to actually handle a truncstore for double -> float, it would just output a store of a full double in the space for a float hence overwriting other bits on the stack. Patch by Luqman Aden! llvm-svn: 217410
2014-09-09 09:13:36 +08:00
%1 = fptrunc double %0 to float
store float %1, float* %b
ret void
}