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[X86] Add test case to show that we don't set the kill flag properly for fast isel handling of fneg. 

llvm-svn: 360096
This commit is contained in:
Craig Topper 2019-05-06 23:08:17 +00:00
parent 491746a584
commit 24cfb7a992
1 changed files with 22 additions and 0 deletions
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llvm/test/CodeGen/X86/fast-isel-fneg-kill.ll Normal file
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -fast-isel -fast-isel-abort=3 -mtriple=x86_64-apple-darwin10 -stop-after=expand-isel-pseudos | FileCheck %s
; Make sure we output the right kill flag for the xor conversion.
define void @goo(double* %x, double* %y) nounwind {
; CHECK: %[[REG2:.*]]:gr64 = COPY $rsi
; CHECK-NEXT: %[[REG0:.*]]:gr64 = COPY $rdi
; CHECK-NEXT: %[[REG1:.*]]:gr64 = COPY killed %[[REG0]]
; CHECK-NEXT: %[[REG3:.*]]:gr64 = COPY killed %[[REG2]]
; CHECK-NEXT: %[[REG10:.*]]:fr64 = MOVSDrm %[[REG1]], 1, $noreg, 0, $noreg :: (load 8 from %ir.x)
; CHECK-NEXT: %[[REG6:.*]]:gr64 = MOVSDto64rr %[[REG10]]
; CHECK-NEXT: %[[REG7:.*]]:gr64 = MOV64ri -9223372036854775808
; CHECK-NEXT: %[[REG8:.*]]:gr64 = XOR64rr killed %[[REG6]], %[[REG7]], implicit-def $eflags
; CHECK-NEXT: %[[REG9:.*]]:fr64 = MOV64toSDrr killed %[[REG8]]
; CHECK-NEXT: MOVSDmr %[[REG3]], 1, $noreg, 0, $noreg, killed %[[REG9]] :: (store 8 into %ir.y)
; CHECK-NEXT: RETQ
%a = load double, double* %x
%b = fsub double -0.0, %a
store double %b, double* %y
ret void
}