derek.holloway
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61 lines
2.2 KiB
LLVM
61 lines
2.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -passes=jump-threading -jump-threading-threshold=3 < %s | FileCheck %s
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; TODO: In this test case, only the stores in %join should count towards
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; the jump threading threshold, as everything else are free instructions.
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define i32 @free_instructions(i1 %c, ptr %p) {
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; CHECK-LABEL: @free_instructions(
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; CHECK-NEXT: br i1 [[C:%.*]], label [[IF2:%.*]], label [[ELSE2:%.*]]
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; CHECK: if2:
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; CHECK-NEXT: store i32 -1, ptr [[P:%.*]], align 4
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; CHECK-NEXT: call void @llvm.experimental.noalias.scope.decl(metadata [[META0:![0-9]+]])
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; CHECK-NEXT: store i32 1, ptr [[P]], align 4, !noalias !0
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; CHECK-NEXT: call void @llvm.assume(i1 true) [ "align"(ptr [[P]], i64 32) ]
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; CHECK-NEXT: store i32 2, ptr [[P]], align 4
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; CHECK-NEXT: [[P32:%.*]] = call ptr @llvm.launder.invariant.group.p0(ptr [[P]])
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; CHECK-NEXT: store i32 3, ptr [[P32]], align 4, !invariant.group !3
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; CHECK-NEXT: ret i32 0
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; CHECK: else2:
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; CHECK-NEXT: store i32 -2, ptr [[P]], align 4
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; CHECK-NEXT: call void @llvm.experimental.noalias.scope.decl(metadata [[META4:![0-9]+]])
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; CHECK-NEXT: store i32 1, ptr [[P]], align 4, !noalias !4
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; CHECK-NEXT: call void @llvm.assume(i1 true) [ "align"(ptr [[P]], i64 32) ]
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; CHECK-NEXT: store i32 2, ptr [[P]], align 4
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; CHECK-NEXT: [[P3:%.*]] = call ptr @llvm.launder.invariant.group.p0(ptr [[P]])
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; CHECK-NEXT: store i32 3, ptr [[P3]], align 4, !invariant.group !3
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; CHECK-NEXT: ret i32 1
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;
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br i1 %c, label %if, label %else
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if:
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store i32 -1, ptr %p
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br label %join
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else:
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store i32 -2, ptr %p
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br label %join
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join:
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call void @llvm.experimental.noalias.scope.decl(metadata !0)
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store i32 1, ptr %p, !noalias !0
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call void @llvm.assume(i1 true) ["align"(ptr %p, i64 32)]
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store i32 2, ptr %p
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%p3 = call ptr @llvm.launder.invariant.group.p0(ptr %p)
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store i32 3, ptr %p3, !invariant.group !{}
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br i1 %c, label %if2, label %else2
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if2:
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ret i32 0
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else2:
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ret i32 1
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}
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declare void @llvm.assume(i1)
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declare void @llvm.experimental.noalias.scope.decl(metadata)
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declare ptr @llvm.launder.invariant.group.p0(ptr)
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!0 = !{!1}
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!1 = distinct !{!1, !2, !"scope"}
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!2 = distinct !{!2, !"domain"}
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