Re-apply r251050 with a for PR25421

[oota-llvm.git] / test / Transforms / IndVarSimplify / pr25421.ll

diff --git a/test/Transforms/IndVarSimplify/pr25421.ll b/test/Transforms/IndVarSimplify/pr25421.ll
new file mode 100644 (file)
index 0000000..efb71f9
--- /dev/null
+++ b/test/Transforms/IndVarSimplify/pr25421.ll
@@ -0,0 +1,30 @@
+; RUN: opt -S -indvars < %s | FileCheck %s
+
+target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.11.0"
+
+declare void @use(i1)
+
+define void @f(i32 %x) {
+; CHECK-LABEL: @f(
+ entry:
+  %conv = sext i32 %x to i64
+  %sub = add i64 %conv, -1
+  %ec = icmp sgt i32 %x, 0
+  br i1 %ec, label %loop, label %leave
+
+ loop:
+; CHECK: loop:
+  %iv = phi i64 [ 0, %entry ], [ %iv.inc, %loop ]
+  %iv.inc = add i64 %iv, 1
+  %cmp = icmp slt i64 %iv, %sub
+  call void @use(i1 %cmp)
+; CHECK: call void @use(i1 %cmp)
+; CHECK-NOT: call void @use(i1 true)
+
+  %be.cond = icmp slt i64 %iv.inc, %conv
+  br i1 %be.cond, label %loop, label %leave
+
+ leave:
+  ret void
+}