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[AArch64] add fabs tests for PR36600; NFC 

llvm-svn: 327995
This commit is contained in:
Sanjay Patel 2018-03-20 16:08:47 +00:00
parent 648ed2dedb
commit 5a9210e651
1 changed files with 33 additions and 0 deletions
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33
llvm/test/CodeGen/AArch64/fabs.ll Normal file
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=aarch64-unknown-unknown | FileCheck %s
; FIXME:
; PR36600: https://bugs.llvm.org/show_bug.cgi?id=36600
; This is not fabs. If X = -0.0, it should return -0.0 not 0.0.
define double @not_fabs(double %x) #0 {
; CHECK-LABEL: not_fabs:
; CHECK: // %bb.0:
; CHECK-NEXT: fabs d0, d0
; CHECK-NEXT: ret
%cmp = fcmp nnan ole double %x, 0.0
%sub = fsub nnan double -0.0, %x
%cond = select i1 %cmp, double %sub, double %x
ret double %cond
}
; Try again with different type, predicate, and compare constant.
define float @still_not_fabs(float %x) #0 {
; CHECK-LABEL: still_not_fabs:
; CHECK: // %bb.0:
; CHECK-NEXT: fabs s0, s0
; CHECK-NEXT: ret
%cmp = fcmp nnan oge float %x, -0.0
%sub = fsub nnan float -0.0, %x
%cond = select i1 %cmp, float %x, float %sub
ret float %cond
}
attributes #0 = { "no-nans-fp-math"="true" }