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authorDuncan Sands <baldrick@free.fr>2011-05-04 16:05:05 +0000
committerDuncan Sands <baldrick@free.fr>2011-05-04 16:05:05 +0000
commit8140ad32ce45281ed2bc4f6ca388a6ed9f806550 (patch)
treeba5f006912d3eb6495a33fae19bea52a8e57070f /test/Transforms/InstSimplify
parent269687fa350c1aa044bc063c64362a04ecabaa33 (diff)
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Add variations on: max(x,y) >= min(x,z) folds to true. This isn't that common,
but according to my super-optimizer there are only two missed simplifications of -instsimplify kind when compiling bzip2, and this is one of them. It amuses me to have bzip2 be perfectly optimized as far as instsimplify goes! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130840 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/InstSimplify')
-rw-r--r--test/Transforms/InstSimplify/maxmin.ll88
1 files changed, 88 insertions, 0 deletions
diff --git a/test/Transforms/InstSimplify/maxmin.ll b/test/Transforms/InstSimplify/maxmin.ll
index 6d9225921c..707422cc01 100644
--- a/test/Transforms/InstSimplify/maxmin.ll
+++ b/test/Transforms/InstSimplify/maxmin.ll
@@ -143,3 +143,91 @@ define i1 @min8(i32 %x, i32 %y) {
ret i1 %r
; CHECK: ret i1 true
}
+
+define i1 @maxmin1(i32 %x, i32 %y, i32 %z) {
+; CHECK: @maxmin1
+ %c1 = icmp sge i32 %x, %y
+ %max = select i1 %c1, i32 %x, i32 %y
+ %c2 = icmp sge i32 %x, %z
+ %min = select i1 %c2, i32 %z, i32 %x
+ %c = icmp sge i32 %max, %min
+ ret i1 %c
+; CHECK: ret i1 true
+}
+
+define i1 @maxmin2(i32 %x, i32 %y, i32 %z) {
+; CHECK: @maxmin2
+ %c1 = icmp sge i32 %x, %y
+ %max = select i1 %c1, i32 %x, i32 %y
+ %c2 = icmp sge i32 %x, %z
+ %min = select i1 %c2, i32 %z, i32 %x
+ %c = icmp sgt i32 %min, %max
+ ret i1 %c
+; CHECK: ret i1 false
+}
+
+define i1 @maxmin3(i32 %x, i32 %y, i32 %z) {
+; CHECK: @maxmin3
+ %c1 = icmp sge i32 %x, %y
+ %max = select i1 %c1, i32 %x, i32 %y
+ %c2 = icmp sge i32 %x, %z
+ %min = select i1 %c2, i32 %z, i32 %x
+ %c = icmp sle i32 %min, %max
+ ret i1 %c
+; CHECK: ret i1 true
+}
+
+define i1 @maxmin4(i32 %x, i32 %y, i32 %z) {
+; CHECK: @maxmin4
+ %c1 = icmp sge i32 %x, %y
+ %max = select i1 %c1, i32 %x, i32 %y
+ %c2 = icmp sge i32 %x, %z
+ %min = select i1 %c2, i32 %z, i32 %x
+ %c = icmp slt i32 %max, %min
+ ret i1 %c
+; CHECK: ret i1 false
+}
+
+define i1 @maxmin5(i32 %x, i32 %y, i32 %z) {
+; CHECK: @maxmin5
+ %c1 = icmp uge i32 %x, %y
+ %max = select i1 %c1, i32 %x, i32 %y
+ %c2 = icmp uge i32 %x, %z
+ %min = select i1 %c2, i32 %z, i32 %x
+ %c = icmp uge i32 %max, %min
+ ret i1 %c
+; CHECK: ret i1 true
+}
+
+define i1 @maxmin6(i32 %x, i32 %y, i32 %z) {
+; CHECK: @maxmin6
+ %c1 = icmp uge i32 %x, %y
+ %max = select i1 %c1, i32 %x, i32 %y
+ %c2 = icmp uge i32 %x, %z
+ %min = select i1 %c2, i32 %z, i32 %x
+ %c = icmp ugt i32 %min, %max
+ ret i1 %c
+; CHECK: ret i1 false
+}
+
+define i1 @maxmin7(i32 %x, i32 %y, i32 %z) {
+; CHECK: @maxmin7
+ %c1 = icmp uge i32 %x, %y
+ %max = select i1 %c1, i32 %x, i32 %y
+ %c2 = icmp uge i32 %x, %z
+ %min = select i1 %c2, i32 %z, i32 %x
+ %c = icmp ule i32 %min, %max
+ ret i1 %c
+; CHECK: ret i1 true
+}
+
+define i1 @maxmin8(i32 %x, i32 %y, i32 %z) {
+; CHECK: @maxmin8
+ %c1 = icmp uge i32 %x, %y
+ %max = select i1 %c1, i32 %x, i32 %y
+ %c2 = icmp uge i32 %x, %z
+ %min = select i1 %c2, i32 %z, i32 %x
+ %c = icmp ult i32 %max, %min
+ ret i1 %c
+; CHECK: ret i1 false
+}