diff options
Diffstat (limited to 'llvm/test/Transforms/SimplifyCFG/wc-widen-block.ll')
| -rw-r--r-- | llvm/test/Transforms/SimplifyCFG/wc-widen-block.ll | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/llvm/test/Transforms/SimplifyCFG/wc-widen-block.ll b/llvm/test/Transforms/SimplifyCFG/wc-widen-block.ll index d6be9cd53a1..79bbefd1266 100644 --- a/llvm/test/Transforms/SimplifyCFG/wc-widen-block.ll +++ b/llvm/test/Transforms/SimplifyCFG/wc-widen-block.ll @@ -305,6 +305,66 @@ deopt2: ret i32 %deoptret2 } +; This one is subtle - We can't widen only one branch use of the +; widenable condition as two branches are correlated. We'd have to +; widen them *both*. +define i32 @neg_correlated(i1 %cond_0, i1 %cond_1, i32* %p) { +; CHECK-LABEL: @neg_correlated( +; CHECK-NEXT: entry: +; CHECK-NEXT: [[WIDENABLE_COND:%.*]] = call i1 @llvm.experimental.widenable.condition() +; CHECK-NEXT: [[EXIPLICIT_GUARD_COND:%.*]] = and i1 [[COND_0:%.*]], [[WIDENABLE_COND]] +; CHECK-NEXT: br i1 [[EXIPLICIT_GUARD_COND]], label [[GUARDED:%.*]], label [[DEOPT:%.*]], !prof !0 +; CHECK: deopt: +; CHECK-NEXT: [[DEOPTRET:%.*]] = call i32 (...) @llvm.experimental.deoptimize.i32() [ "deopt"() ] +; CHECK-NEXT: ret i32 [[DEOPTRET]] +; CHECK: guarded: +; CHECK-NEXT: [[EXIPLICIT_GUARD_COND2:%.*]] = and i1 [[COND_1:%.*]], [[WIDENABLE_COND]] +; CHECK-NEXT: br i1 [[EXIPLICIT_GUARD_COND2]], label [[GUARDED2:%.*]], label [[DEOPT2:%.*]], !prof !0 +; CHECK: deopt2: +; CHECK-NEXT: [[DEOPTRET2:%.*]] = call i32 (...) @llvm.experimental.deoptimize.i32() [ "deopt"() ] +; CHECK-NEXT: ret i32 [[DEOPTRET2]] +; CHECK: guarded2: +; CHECK-NEXT: [[V:%.*]] = load i32, i32* [[P:%.*]] +; CHECK-NEXT: [[COND_2:%.*]] = icmp eq i32 [[V]], 0 +; CHECK-NEXT: br i1 [[COND_2]], label [[RETURN:%.*]], label [[DEOPT3:%.*]], !prof !0 +; CHECK: deopt3: +; CHECK-NEXT: [[DEOPTRET3:%.*]] = call i32 (...) @llvm.experimental.deoptimize.i32() [ "deopt"() ] +; CHECK-NEXT: ret i32 [[DEOPTRET3]] +; CHECK: return: +; CHECK-NEXT: ret i32 0 +; +entry: + %widenable_cond = call i1 @llvm.experimental.widenable.condition() + %exiplicit_guard_cond = and i1 %cond_0, %widenable_cond + br i1 %exiplicit_guard_cond, label %guarded, label %deopt, !prof !0 + +deopt: + %deoptret = call i32 (...) @llvm.experimental.deoptimize.i32() [ "deopt"() ] + ret i32 %deoptret + +guarded: + %exiplicit_guard_cond2 = and i1 %cond_1, %widenable_cond + br i1 %exiplicit_guard_cond2, label %guarded2, label %deopt2, !prof !0 + +deopt2: + %deoptret2 = call i32 (...) @llvm.experimental.deoptimize.i32() [ "deopt"() ] + ret i32 %deoptret2 + +guarded2: + %v = load i32, i32* %p + %cond_2 = icmp eq i32 %v, 0 + br i1 %cond_2, label %return, label %deopt3, !prof !0 + +deopt3: + %deoptret3 = call i32 (...) @llvm.experimental.deoptimize.i32() [ "deopt"() ] + ret i32 %deoptret3 + +return: + ret i32 0 +} + + + declare void @unknown() declare i32 @unknown_i32() |
