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authorJean-Luc Duprat <jduprat@apple.com>2013-05-06 16:55:50 +0000
committerJean-Luc Duprat <jduprat@apple.com>2013-05-06 16:55:50 +0000
commitc5cf6e536598a3b1e30fce616b771d66a071a54c (patch)
tree52f21b614d462af5f1d237be0892b711558ea1e1 /test/Transforms
parent4c8850cd1c97eff659169967bb70b6e22c3ace27 (diff)
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Provide InstCombines for the following 3 cases:
A * (1 - (uitofp i1 C)) -> select C, 0, A B * (uitofp i1 C) -> select C, B, 0 select C, 0, A + select C, B, 0 -> select C, B, A These come up in code that has been hand-optimized from a select to a linear blend, on platforms where that may have mattered. We want to undo such changes with the following transform: A*(1 - uitofp i1 C) + B*(uitofp i1 C) -> select C, A, B git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181216 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms')
-rw-r--r--test/Transforms/InstCombine/add4.ll34
1 files changed, 34 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/add4.ll b/test/Transforms/InstCombine/add4.ll
new file mode 100644
index 0000000..9cc24e9
--- /dev/null
+++ b/test/Transforms/InstCombine/add4.ll
@@ -0,0 +1,34 @@
+; RUN: opt < %s -instcombine -S | grep inttoptr | count 2
+
+;; Target triple for gep raising case below.
+target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
+target triple = "i686-apple-darwin8"
+
+define float @test1(float %A, float %B, i1 %C) {
+EntryBlock:
+ ;; A*(1 - uitofp i1 C) -> select C, 0, A
+ %cf = uitofp i1 %C to float
+ %mc = fsub float 1.000000e+00, %cf
+ %p1 = fmul fast float %A, %mc
+ ret float %p1
+}
+
+define float @test2(float %A, float %B, i1 %C) {
+EntryBlock:
+ ;; B*(uitofp i1 C) -> select C, B, 0
+ %cf = uitofp i1 %C to float
+ %p2 = fmul fast float %B, %cf
+ ret float %p2
+}
+
+define float @test3(float %A, float %B, i1 %C) {
+EntryBlock:
+ ;; A*(1 - uitofp i1 C) + B*(uitofp i1 C) -> select C, A, B
+ %cf = uitofp i1 %C to float
+ %mc = fsub float 1.000000e+00, %cf
+ %p1 = fmul fast float %A, %mc
+ %p2 = fmul fast float %B, %cf
+ %s1 = fadd fast float %p1, %p2
+ ret float %s1
+}
+