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| author | Davide Italiano <davide@freebsd.org> | 2017-05-19 04:06:10 +0000 |
|---|---|---|
| committer | Davide Italiano <davide@freebsd.org> | 2017-05-19 04:06:10 +0000 |
| commit | ee49f4943c3f83513ed2c230f12df3f40f355e03 (patch) | |
| tree | 79a6f97ffb14cae3bd1d5b37f255a1a14890277c /llvm/test/Transforms/NewGVN | |
| parent | 977158488e532bb26d94612fa116c8362202ee4e (diff) | |
| download | bcm5719-llvm-ee49f4943c3f83513ed2c230f12df3f40f355e03.tar.gz bcm5719-llvm-ee49f4943c3f83513ed2c230f12df3f40f355e03.zip | |
[NewGVN] Delete the old store when we find congruent to a load.
(or non-store, more in general). Fixes PR33086. Caught by the
store verifier.
llvm-svn: 303406
Diffstat (limited to 'llvm/test/Transforms/NewGVN')
| -rw-r--r-- | llvm/test/Transforms/NewGVN/pr33086.ll | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/llvm/test/Transforms/NewGVN/pr33086.ll b/llvm/test/Transforms/NewGVN/pr33086.ll new file mode 100644 index 00000000000..6117ef35e6d --- /dev/null +++ b/llvm/test/Transforms/NewGVN/pr33086.ll @@ -0,0 +1,59 @@ +; RUN: opt -newgvn -S %s | FileCheck %s +; REQUIRES: asserts + +; CHECK-LABEL: define void @tinkywinky() { +; CHECK: entry: +; CHECK-NEXT: br i1 undef, label %for.cond18, label %for.cond.preheader +; CHECK: for.cond.preheader: +; CHECK-NEXT: br label %for.cond2thread-pre-split +; CHECK: for.cond2thread-pre-split: +; CHECK-NEXT: %conv24 = phi i32 [ 0, %for.cond.preheader ], [ %conv, %for.inc.split ] +; CHECK-NEXT: br label %for.inc.split +; CHECK: for.inc.split: +; CHECK-NEXT: %add = shl nsw i32 %conv24, 16 +; CHECK-NEXT: %sext23 = add i32 %add, 65536 +; CHECK-NEXT: %conv = ashr exact i32 %sext23, 16 +; CHECK-NEXT: %cmp = icmp slt i32 %sext23, 3604480 +; CHECK-NEXT: br i1 %cmp, label %for.cond2thread-pre-split, label %l1.loopexit +; CHECK: l1.loopexit: +; CHECK-NEXT: br label %l1 +; CHECK: l1: +; CHECK-NEXT: %0 = load i16, i16* null, align 2 +; CHECK-NEXT: %g.0.g.0..pr = load i16, i16* null, align 2 +; CHECK-NEXT: ret void +; CHECK: for.cond18: +; CHECK-NEXT: br label %l1 +; CHECK-NEXT: } + +define void @tinkywinky() { +entry: + br i1 undef, label %for.cond18, label %for.cond.preheader + +for.cond.preheader: + br label %for.cond2thread-pre-split + +for.cond2thread-pre-split: + %conv24 = phi i32 [ 0, %for.cond.preheader ], [ %conv, %for.inc.split ] + br label %for.inc.split + +for.inc.split: + %add = shl nsw i32 %conv24, 16 + %sext23 = add i32 %add, 65536 + %conv = ashr exact i32 %sext23, 16 + %cmp = icmp slt i32 %sext23, 3604480 + br i1 %cmp, label %for.cond2thread-pre-split, label %l1.loopexit + +l1.loopexit: + br label %l1 + +l1: + %h.0 = phi i16* [ undef, %for.cond18 ], [ null, %l1.loopexit ] + %0 = load i16, i16* %h.0, align 2 + store i16 %0, i16* null, align 2 + %g.0.g.0..pr = load i16, i16* null, align 2 + %tobool15 = icmp eq i16 %g.0.g.0..pr, 0 + ret void + +for.cond18: + br label %l1 +} |
