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| author | Nadav Rotem <nrotem@apple.com> | 2012-08-14 05:19:07 +0000 |
|---|---|---|
| committer | Nadav Rotem <nrotem@apple.com> | 2012-08-14 05:19:07 +0000 |
| commit | 3e883734fab4da8413f16957dd116d4ffd9d3223 (patch) | |
| tree | 3165c1b0a62a477da5ca386e10ee5dc97d752da3 /test/Transforms | |
| parent | 443c9ed7688e66c55c43819a75be681574b291de (diff) | |
| download | external_llvm-3e883734fab4da8413f16957dd116d4ffd9d3223.zip external_llvm-3e883734fab4da8413f16957dd116d4ffd9d3223.tar.gz external_llvm-3e883734fab4da8413f16957dd116d4ffd9d3223.tar.bz2 | |
During the CodeGenPrepare we often lower intrinsics (such as objsize)
and allow some optimizations to turn conditional branches into unconditional.
This commit adds a simple control-flow optimization which merges two consecutive
basic blocks which are connected by a single edge. This allows the codegen to
operate on larger basic blocks.
rdar://11973998
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161852 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms')
| -rw-r--r-- | test/Transforms/CodeGenPrepare/basic.ll | 6 | ||||
| -rw-r--r-- | test/Transforms/LoopStrengthReduce/ARM/2012-06-15-lsr-noaddrmode.ll | 8 |
2 files changed, 7 insertions, 7 deletions
diff --git a/test/Transforms/CodeGenPrepare/basic.ll b/test/Transforms/CodeGenPrepare/basic.ll index ebf10f0..c68e77e 100644 --- a/test/Transforms/CodeGenPrepare/basic.ll +++ b/test/Transforms/CodeGenPrepare/basic.ll @@ -5,7 +5,7 @@ target triple = "x86_64-apple-darwin10.0.0" ; CHECK: @test1 ; objectsize should fold to a constant, which causes the branch to fold to an -; uncond branch. +; uncond branch. Next, we fold the control flow alltogether. ; rdar://8785296 define i32 @test1(i8* %ptr) nounwind ssp noredzone align 2 { entry: @@ -13,8 +13,8 @@ entry: %1 = icmp ugt i64 %0, 3 br i1 %1, label %T, label %trap -; CHECK: entry: -; CHECK-NEXT: br label %T +; CHECK: T: +; CHECK-NOT: br label % trap: ; preds = %0, %entry tail call void @llvm.trap() noreturn nounwind diff --git a/test/Transforms/LoopStrengthReduce/ARM/2012-06-15-lsr-noaddrmode.ll b/test/Transforms/LoopStrengthReduce/ARM/2012-06-15-lsr-noaddrmode.ll index 70ead33..b5124ea 100644 --- a/test/Transforms/LoopStrengthReduce/ARM/2012-06-15-lsr-noaddrmode.ll +++ b/test/Transforms/LoopStrengthReduce/ARM/2012-06-15-lsr-noaddrmode.ll @@ -44,7 +44,7 @@ declare %s* @getstruct() nounwind ; CHECK: @main ; Check that the loop preheader contains no address computation. -; CHECK: %entry +; CHECK: %end_of_chain ; CHECK-NOT: add{{.*}}lsl ; CHECK: ldr{{.*}}lsl #2 ; CHECK: ldr{{.*}}lsl #2 @@ -65,15 +65,15 @@ while.cond: while.body: %v3 = load i32* @ncol, align 4, !tbaa !0 - br label %while.cond.i + br label %end_of_chain -while.cond.i: +end_of_chain: %state.i = getelementptr inbounds %s* %call18, i32 0, i32 0 %v4 = load i32** %state.i, align 4, !tbaa !3 br label %while.cond.i.i while.cond.i.i: - %counter.0.i.i = phi i32 [ %v3, %while.cond.i ], [ %dec.i.i, %land.rhs.i.i ] + %counter.0.i.i = phi i32 [ %v3, %end_of_chain ], [ %dec.i.i, %land.rhs.i.i ] %dec.i.i = add nsw i32 %counter.0.i.i, -1 %tobool.i.i = icmp eq i32 %counter.0.i.i, 0 br i1 %tobool.i.i, label %where.exit, label %land.rhs.i.i |