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authorHal Finkel <hfinkel@anl.gov>2013-03-18 17:40:27 +0000
committerHal Finkel <hfinkel@anl.gov>2013-03-18 17:40:27 +0000
commit1448d06156728712f47e5a71fac8e8edc0aba73b (patch)
tree8684c3f9dca12a812e8d4d506a6c6f72c25bc099 /test/CodeGen/PowerPC/ctr-cleanup.ll
parenta12c674ee579685e982db008f546681a10cc49a6 (diff)
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Cleanup initial-value constants in PPCCTRLoops
Because the initial-value constants had not been added to the list of instructions considered for DCE the resulting code had redundant constant-materialization instructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177294 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/PowerPC/ctr-cleanup.ll')
-rw-r--r--test/CodeGen/PowerPC/ctr-cleanup.ll25
1 files changed, 25 insertions, 0 deletions
diff --git a/test/CodeGen/PowerPC/ctr-cleanup.ll b/test/CodeGen/PowerPC/ctr-cleanup.ll
new file mode 100644
index 0000000000..04e4ffb0d4
--- /dev/null
+++ b/test/CodeGen/PowerPC/ctr-cleanup.ll
@@ -0,0 +1,25 @@
+; RUN: llc < %s -mcpu=a2 | FileCheck %s
+target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-f128:128:128-v128:128:128-n32:64"
+target triple = "powerpc64-unknown-linux-gnu"
+
+define void @main() #0 {
+entry:
+ br i1 undef, label %for.end, label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 1, %entry ]
+ %indvars.iv.next = add i64 %indvars.iv, 1
+ %lftr.wideiv = trunc i64 %indvars.iv.next to i32
+ %exitcond = icmp eq i32 %lftr.wideiv, 5
+ br i1 %exitcond, label %for.end, label %for.body
+
+; CHECK: @main
+; CHECK: li {{[0-9]+}}, 4
+; CHECK-NOT: li {{[0-9]+}}, 4
+; CHECK: bdnz
+
+for.end: ; preds = %for.body, %entry
+ ret void
+}
+
+attributes #0 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-frame-pointer-elim-non-leaf"="true" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "unsafe-fp-math"="false" "use-soft-float"="false" }