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39f4e8d9cc
This update was done with the following bash script:
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while read NAME; do
echo "$NAME"
if ! grep -q "^; *RUN: *llc" $NAME; then
TEMP=`mktemp -t temp`
cp $NAME $TEMP
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186268 91177308-0d34-0410-b5e6-96231b3b80d8
108 lines
2.5 KiB
LLVM
108 lines
2.5 KiB
LLVM
; RUN: opt < %s -instsimplify -S | FileCheck %s
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;; x * 0 ==> 0 when no-nans and no-signed-zero
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; CHECK: mul_zero_1
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define float @mul_zero_1(float %a) {
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%b = fmul nsz nnan float %a, 0.0
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; CHECK: ret float 0.0
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ret float %b
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}
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; CHECK: mul_zero_2
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define float @mul_zero_2(float %a) {
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%b = fmul fast float 0.0, %a
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; CHECK: ret float 0.0
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ret float %b
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}
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;; x * 0 =/=> 0 when there could be nans or -0
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; CHECK: no_mul_zero_1
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define float @no_mul_zero_1(float %a) {
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%b = fmul nsz float %a, 0.0
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; CHECK: ret float %b
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ret float %b
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}
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; CHECK: no_mul_zero_2
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define float @no_mul_zero_2(float %a) {
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%b = fmul nnan float %a, 0.0
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; CHECK: ret float %b
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ret float %b
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}
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; CHECK: no_mul_zero_3
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define float @no_mul_zero_3(float %a) {
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%b = fmul float %a, 0.0
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; CHECK: ret float %b
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ret float %b
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}
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; fadd [nnan ninf] X, (fsub [nnan ninf] 0, X) ==> 0
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; where nnan and ninf have to occur at least once somewhere in this
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; expression
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; CHECK: fadd_fsub_0
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define float @fadd_fsub_0(float %a) {
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; X + -X ==> 0
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%t1 = fsub nnan ninf float 0.0, %a
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%zero1 = fadd nnan ninf float %t1, %a
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%t2 = fsub nnan float 0.0, %a
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%zero2 = fadd ninf float %t2, %a
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%t3 = fsub nnan ninf float 0.0, %a
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%zero3 = fadd float %t3, %a
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%t4 = fsub float 0.0, %a
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%zero4 = fadd nnan ninf float %t4, %a
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; Dont fold this
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; CHECK: %nofold = fsub float 0.0
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%nofold = fsub float 0.0, %a
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; CHECK: %no_zero = fadd nnan float %nofold, %a
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%no_zero = fadd nnan float %nofold, %a
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; Coalesce the folded zeros
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%zero5 = fadd float %zero1, %zero2
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%zero6 = fadd float %zero3, %zero4
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%zero7 = fadd float %zero5, %zero6
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; Should get folded
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%ret = fadd nsz float %no_zero, %zero7
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; CHECK: ret float %no_zero
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ret float %ret
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}
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; fsub nnan ninf x, x ==> 0.0
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; CHECK-LABEL: @fsub_x_x(
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define float @fsub_x_x(float %a) {
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; X - X ==> 0
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%zero1 = fsub nnan ninf float %a, %a
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; Dont fold
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; CHECK: %no_zero1 = fsub
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%no_zero1 = fsub ninf float %a, %a
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; CHECK: %no_zero2 = fsub
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%no_zero2 = fsub nnan float %a, %a
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; CHECK: %no_zero = fadd
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%no_zero = fadd float %no_zero1, %no_zero2
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; Should get folded
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%ret = fadd nsz float %no_zero, %zero1
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; CHECK: ret float %no_zero
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ret float %ret
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}
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; fadd nsz X, 0 ==> X
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; CHECK-LABEL: @nofold_fadd_x_0(
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define float @nofold_fadd_x_0(float %a) {
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; Dont fold
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; CHECK: %no_zero1 = fadd
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%no_zero1 = fadd ninf float %a, 0.0
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; CHECK: %no_zero2 = fadd
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%no_zero2 = fadd nnan float %a, 0.0
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; CHECK: %no_zero = fadd
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%no_zero = fadd float %no_zero1, %no_zero2
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; CHECK: ret float %no_zero
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ret float %no_zero
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}
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