| ; RUN: opt < %s -passes=simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s |
| ; RUN: opt < %s -passes=simplifycfg -S | FileCheck %s |
| |
| define i32 @foo(i32 %x) optforfuzzing { |
| entry: |
| %x.addr = alloca i32, align 4 |
| store i32 %x, ptr %x.addr, align 4 |
| %0 = load i32, ptr %x.addr, align 4 |
| %cmp = icmp sgt i32 %0, 16 |
| br i1 %cmp, label %land.rhs, label %land.end |
| |
| land.rhs: |
| %1 = load i32, ptr %x.addr, align 4 |
| %cmp1 = icmp slt i32 %1, 32 |
| br label %land.end |
| |
| land.end: |
| %2 = phi i1 [ false, %entry ], [ %cmp1, %land.rhs ] |
| %conv = zext i1 %2 to i32 |
| ret i32 %conv |
| |
| ; CHECK-LABEL: define i32 @foo(i32 %x) |
| ; CHECK: br i1 %cmp, label %land.rhs, label %land.end |
| ; CHECK-LABEL: land.rhs: |
| ; CHECK: br label %land.end |
| ; CHECK-LABEL: land.end: |
| ; CHECK: phi {{.*}} %entry {{.*}} %land.rhs |
| } |
| |
| define i32 @bar(i32 %x) { |
| entry: |
| %x.addr = alloca i32, align 4 |
| store i32 %x, ptr %x.addr, align 4 |
| %0 = load i32, ptr %x.addr, align 4 |
| %cmp = icmp sgt i32 %0, 16 |
| br i1 %cmp, label %land.rhs, label %land.end |
| |
| land.rhs: |
| %1 = load i32, ptr %x.addr, align 4 |
| %cmp1 = icmp slt i32 %1, 32 |
| br label %land.end |
| |
| land.end: |
| %2 = phi i1 [ false, %entry ], [ %cmp1, %land.rhs ] |
| %conv = zext i1 %2 to i32 |
| ret i32 %conv |
| |
| ; CHECK-LABEL: define i32 @bar(i32 %x) |
| ; CHECK-NOT: br |
| } |