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| author | Davide Italiano <davide@freebsd.org> | 2017-05-24 02:30:24 +0000 |
|---|---|---|
| committer | Davide Italiano <davide@freebsd.org> | 2017-05-24 02:30:24 +0000 |
| commit | fd9100e056e6417335bc839d35daa549e9848bee (patch) | |
| tree | 93ab4f3c5059a80049276aa470ff221bd60e9fe2 /llvm/test | |
| parent | db615dd677b65c89266e413ad14bf9377cf84e93 (diff) | |
| download | bcm5719-llvm-fd9100e056e6417335bc839d35daa549e9848bee.tar.gz bcm5719-llvm-fd9100e056e6417335bc839d35daa549e9848bee.zip | |
[NewGVN] Update additionalUsers when we simplify to a value.
Otherwise we don't revisit an instruction that could be simplified,
and when we verify, we discover there's something that changed, i.e.
what we had wasn't a maximal fixpoint.
Fixes PR32836.
llvm-svn: 303715
Diffstat (limited to 'llvm/test')
| -rw-r--r-- | llvm/test/Transforms/NewGVN/pr32836.ll | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/llvm/test/Transforms/NewGVN/pr32836.ll b/llvm/test/Transforms/NewGVN/pr32836.ll new file mode 100644 index 00000000000..623f216101b --- /dev/null +++ b/llvm/test/Transforms/NewGVN/pr32836.ll @@ -0,0 +1,45 @@ +; NOTE: Assertions have been autogenerated by utils/update_test_checks.py +; RUN: opt -S -newgvn %s | FileCheck %s + +%struct.anon = type { i32 } +@b = external global %struct.anon +define void @tinkywinky(i1 %patatino) { +; CHECK-LABEL: @tinkywinky( +; CHECK-NEXT: store i32 8, i32* null +; CHECK-NEXT: br i1 [[PATATINO:%.*]], label [[IF_END:%.*]], label [[IF_THEN:%.*]] +; CHECK: if.then: +; CHECK-NEXT: br label [[L:%.*]] +; CHECK: L: +; CHECK-NEXT: br label [[IF_END]] +; CHECK: if.end: +; CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* null +; CHECK-NEXT: [[BF_LOAD1:%.*]] = load i32, i32* getelementptr inbounds (%struct.anon, %struct.anon* @b, i64 0, i32 0) +; CHECK-NEXT: [[BF_VALUE:%.*]] = and i32 [[TMP1]], 536870911 +; CHECK-NEXT: [[BF_CLEAR:%.*]] = and i32 [[BF_LOAD1]], -536870912 +; CHECK-NEXT: [[BF_SET:%.*]] = or i32 [[BF_CLEAR]], [[BF_VALUE]] +; CHECK-NEXT: store i32 [[BF_SET]], i32* getelementptr inbounds (%struct.anon, %struct.anon* @b, i64 0, i32 0) +; CHECK-NEXT: br label [[LOR_END:%.*]] +; CHECK: lor.end: +; CHECK-NEXT: br label [[L]] +; + store i32 8, i32* null + br i1 %patatino, label %if.end, label %if.then +if.then: + store i32 8, i32* null + br label %L +L: + br label %if.end +if.end: + %tmp1 = load i32, i32* null + %bf.load1 = load i32, i32* getelementptr (%struct.anon, %struct.anon* @b, i64 0, i32 0) + %bf.value = and i32 %tmp1, 536870911 + %bf.clear = and i32 %bf.load1, -536870912 + %bf.set = or i32 %bf.clear, %bf.value + store i32 %bf.set, i32* getelementptr (%struct.anon, %struct.anon* @b, i64 0, i32 0) + br label %lor.end +lor.end: + %bf.load4 = load i32, i32* getelementptr (%struct.anon, %struct.anon* @b, i64 0, i32 0) + %tmp4 = and i32 %bf.load4, 536870911 + %or = or i32 0, %tmp4 + br label %L +} |
