blob: fc0d09510806513aac98ac3bb9593e4181d18563 [file] [log] [blame]
; 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 }