| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt -S -gvn -o - %s | FileCheck %s |
| ; RUN: opt -S -passes=gvn -o - %s | FileCheck %s |
| |
| define i32 @foo(i1 %cond, i32* %q, i32* %p) { |
| ; CHECK-LABEL: @foo( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[V0:%.*]] = call i32 @llvm.convergent(i32 0) |
| ; CHECK-NEXT: store i32 [[V0]], i32* [[Q:%.*]], align 4 |
| ; CHECK-NEXT: br i1 [[COND:%.*]], label [[PRE:%.*]], label [[MERGE:%.*]] |
| ; CHECK: pre: |
| ; CHECK-NEXT: [[T0:%.*]] = load i32, i32* [[P:%.*]], align 4 |
| ; CHECK-NEXT: br label [[MERGE]] |
| ; CHECK: merge: |
| ; CHECK-NEXT: [[M0:%.*]] = phi i32 [ [[T0]], [[PRE]] ], [ 0, [[ENTRY:%.*]] ] |
| ; CHECK-NEXT: [[R0:%.*]] = call i32 @llvm.convergent(i32 [[M0]]) |
| ; CHECK-NEXT: ret i32 [[R0]] |
| ; |
| entry: |
| %v0 = call i32 @llvm.convergent(i32 0) |
| store i32 %v0, i32* %q |
| br i1 %cond, label %pre, label %merge |
| |
| pre: |
| %t0 = load i32, i32* %p |
| br label %merge |
| |
| merge: |
| %m0 = phi i32 [ %t0, %pre ], [ 0, %entry ] |
| %r0 = call i32 @llvm.convergent(i32 %m0) |
| ret i32 %r0 |
| } |
| |
| declare i32 @llvm.convergent(i32) #0 |
| |
| attributes #0 = { convergent nounwind readnone } |