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llvm-project/llvm/test/CodeGen/X86/fp-stack-compare-cmov.ll

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X86: Don't emit conditional floating point moves on when targeting pre-pentiumpro architectures. * Model FPSW (the FPU status word) as a register. * Add ISel patterns for the FUCOM*, FNSTSW and SAHF instructions. * During Legalize/Lowering, build a node sequence to transfer the comparison result from FPSW into EFLAGS. If you're wondering about the right-shift: That's an implicit sub-register extraction (%ax -> %ah) which is handled later on by the instruction selector. Fixes PR6679. Patch by Christoph Erhardt! llvm-svn: 155704
2012-04-27 20:07:43 +08:00
; RUN: llc < %s -march=x86 -mcpu=pentiumpro | FileCheck %s
; PR1012
define float @foo(float* %col.2.0) {
; CHECK: fucompi
; CHECK: fcmov
[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
%tmp = load float, float* %col.2.0
X86: Don't emit conditional floating point moves on when targeting pre-pentiumpro architectures. * Model FPSW (the FPU status word) as a register. * Add ISel patterns for the FUCOM*, FNSTSW and SAHF instructions. * During Legalize/Lowering, build a node sequence to transfer the comparison result from FPSW into EFLAGS. If you're wondering about the right-shift: That's an implicit sub-register extraction (%ax -> %ah) which is handled later on by the instruction selector. Fixes PR6679. Patch by Christoph Erhardt! llvm-svn: 155704
2012-04-27 20:07:43 +08:00
%tmp16 = fcmp olt float %tmp, 0.000000e+00
%tmp20 = fsub float -0.000000e+00, %tmp
%iftmp.2.0 = select i1 %tmp16, float %tmp20, float %tmp
ret float %iftmp.2.0
}