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Fast-math test for SimplifyInstruction: fold multiply by 0

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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
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55
0007-Fast-math-test-for-SimplifyInstruction-fold-multiply.patch
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@ -1,55 +0,0 @@
From a3d62a84e2805fc54fe721610de350cf23469aa4 Mon Sep 17 00:00:00 2001
From: Michael Ilseman <milseman@apple.com>
Date: Thu, 15 Nov 2012 10:04:58 -0800
Subject: [PATCH 7/8] Fast-math test for SimplifyInstruction: fold multiply by
0
---
test/Transforms/InstSimplify/fast-math.ll | 35 +++++++++++++++++++++++++++++++
1 file changed, 35 insertions(+)
create mode 100644 test/Transforms/InstSimplify/fast-math.ll
diff --git a/test/Transforms/InstSimplify/fast-math.ll b/test/Transforms/InstSimplify/fast-math.ll
new file mode 100644
index 0000000..e4b3ea3
--- /dev/null
+++ b/test/Transforms/InstSimplify/fast-math.ll
@@ -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
+}
--
1.7.12.2 (Apple Git-36)

35
test/Transforms/InstSimplify/fast-math.ll Normal file
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@ -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
}