6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2026-04-21 08:17:40 +00:00
Code Issues Projects Releases Wiki Activity

Fast-math test for SimplifyInstruction: fold multiply by 0

Browse Source 
Applied the patch, rather than committing it.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168656 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michael Ilseman
2012-11-27 01:00:22 +00:00
parent 9780d352b9
commit bc43fe1efe
2 changed files with 35 additions and 55 deletions
Download Patch File Download Diff File Expand all files Collapse all files
test/Transforms/InstSimplify/fast-math.ll
+35
View File
@@ -0,0 +1,35 @@
; RUN: opt < %s -instsimplify -S | FileCheck %s
;; x * 0 ==> 0 when no-nans and no-signed-zero
; CHECK: mul_zero_1
define float @mul_zero_1(float %a) {
%b = fmul nsz nnan float %a, 0.0
; CHECK: ret float 0.0
ret float %b
}
; CHECK: mul_zero_2
define float @mul_zero_2(float %a) {
%b = fmul fast float 0.0, %a
; CHECK: ret float 0.0
ret float %b
}
;; x * 0 =/=> 0 when there could be nans or -0
; CHECK: no_mul_zero_1
define float @no_mul_zero_1(float %a) {
%b = fmul nsz float %a, 0.0
; CHECK: ret float %b
ret float %b
}
; CHECK: no_mul_zero_2
define float @no_mul_zero_2(float %a) {
%b = fmul nnan float %a, 0.0
; CHECK: ret float %b
ret float %b
}
; CHECK: no_mul_zero_3
define float @no_mul_zero_3(float %a) {
%b = fmul float %a, 0.0
; CHECK: ret float %b
ret float %b
}