| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt -S -jump-threading -jump-threading-threshold=3 < %s | FileCheck %s |
| |
| ; TODO: In this test case, only the stores in %join should cound towards |
| ; the jump threading threshold, as everything else are free instructions. |
| define i32 @free_instructions(i1 %c, i32* %p) { |
| ; CHECK-LABEL: @free_instructions( |
| ; CHECK-NEXT: br i1 [[C:%.*]], label [[IF2:%.*]], label [[ELSE2:%.*]] |
| ; CHECK: if2: |
| ; CHECK-NEXT: store i32 -1, i32* [[P:%.*]], align 4 |
| ; CHECK-NEXT: call void @llvm.experimental.noalias.scope.decl(metadata [[META0:![0-9]+]]) |
| ; CHECK-NEXT: store i32 1, i32* [[P]], align 4, !noalias !0 |
| ; CHECK-NEXT: call void @llvm.assume(i1 true) [ "align"(i32* [[P]], i64 32) ] |
| ; CHECK-NEXT: store i32 2, i32* [[P]], align 4 |
| ; CHECK-NEXT: [[P21:%.*]] = bitcast i32* [[P]] to i8* |
| ; CHECK-NEXT: [[P32:%.*]] = call i8* @llvm.launder.invariant.group.p0i8(i8* [[P21]]) |
| ; CHECK-NEXT: [[P43:%.*]] = bitcast i8* [[P32]] to i32* |
| ; CHECK-NEXT: store i32 3, i32* [[P43]], align 4, !invariant.group !3 |
| ; CHECK-NEXT: ret i32 0 |
| ; CHECK: else2: |
| ; CHECK-NEXT: store i32 -2, i32* [[P]], align 4 |
| ; CHECK-NEXT: call void @llvm.experimental.noalias.scope.decl(metadata [[META4:![0-9]+]]) |
| ; CHECK-NEXT: store i32 1, i32* [[P]], align 4, !noalias !4 |
| ; CHECK-NEXT: call void @llvm.assume(i1 true) [ "align"(i32* [[P]], i64 32) ] |
| ; CHECK-NEXT: store i32 2, i32* [[P]], align 4 |
| ; CHECK-NEXT: [[P2:%.*]] = bitcast i32* [[P]] to i8* |
| ; CHECK-NEXT: [[P3:%.*]] = call i8* @llvm.launder.invariant.group.p0i8(i8* [[P2]]) |
| ; CHECK-NEXT: [[P4:%.*]] = bitcast i8* [[P3]] to i32* |
| ; CHECK-NEXT: store i32 3, i32* [[P4]], align 4, !invariant.group !3 |
| ; CHECK-NEXT: ret i32 1 |
| ; |
| br i1 %c, label %if, label %else |
| |
| if: |
| store i32 -1, i32* %p |
| br label %join |
| |
| else: |
| store i32 -2, i32* %p |
| br label %join |
| |
| join: |
| call void @llvm.experimental.noalias.scope.decl(metadata !0) |
| store i32 1, i32* %p, !noalias !0 |
| call void @llvm.assume(i1 true) ["align"(i32* %p, i64 32)] |
| store i32 2, i32* %p |
| %p2 = bitcast i32* %p to i8* |
| %p3 = call i8* @llvm.launder.invariant.group.p0i8(i8* %p2) |
| %p4 = bitcast i8* %p3 to i32* |
| store i32 3, i32* %p4, !invariant.group !{} |
| br i1 %c, label %if2, label %else2 |
| |
| if2: |
| ret i32 0 |
| |
| else2: |
| ret i32 1 |
| } |
| |
| declare void @llvm.assume(i1) |
| declare void @llvm.experimental.noalias.scope.decl(metadata) |
| declare i8* @llvm.launder.invariant.group.p0i8(i8*) |
| |
| !0 = !{!1} |
| !1 = distinct !{!1, !2, !"scope"} |
| !2 = distinct !{!2, !"domain"} |