62 lines
2.2 KiB
LLVM
62 lines
2.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
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; RUN: opt -S -passes=jump-threading < %s | FileCheck %s
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@f = external global i32
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; Make sure the value of @f is reloaded prior to the final comparison.
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define i32 @test(i64 %idx, i32 %val) {
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; CHECK-LABEL: define i32 @test(
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; CHECK-SAME: i64 [[IDX:%.*]], i32 [[VAL:%.*]]) {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[CMP:%.*]] = icmp slt i64 [[IDX]], 1
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; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY:%.*]], label [[RETURN:%.*]]
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; CHECK: for.body:
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; CHECK-NEXT: [[F:%.*]] = load i32, ptr @f, align 4
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; CHECK-NEXT: [[CMP1:%.*]] = icmp eq i32 [[F]], 0
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; CHECK-NEXT: br i1 [[CMP1]], label [[COND_END_THREAD:%.*]], label [[COND_END:%.*]]
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; CHECK: cond.end:
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; CHECK-NEXT: [[CMP_I:%.*]] = icmp sgt i32 [[VAL]], 0
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; CHECK-NEXT: [[COND_FR:%.*]] = freeze i1 [[CMP_I]]
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; CHECK-NEXT: br i1 [[COND_FR]], label [[COND_END_THREAD]], label [[TMP0:%.*]]
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; CHECK: cond.end.thread:
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; CHECK-NEXT: br label [[TMP0]]
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; CHECK: 0:
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; CHECK-NEXT: [[TMP1:%.*]] = phi i32 [ 0, [[COND_END_THREAD]] ], [ [[VAL]], [[COND_END]] ]
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; CHECK-NEXT: [[F_IDX:%.*]] = getelementptr inbounds i32, ptr @f, i64 [[IDX]]
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; CHECK-NEXT: store i32 [[TMP1]], ptr [[F_IDX]], align 4
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; CHECK-NEXT: [[F_RELOAD:%.*]] = load i32, ptr @f, align 4
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; CHECK-NEXT: [[CMP3:%.*]] = icmp slt i32 [[F_RELOAD]], 1
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; CHECK-NEXT: br i1 [[CMP3]], label [[RETURN2:%.*]], label [[RETURN]]
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; CHECK: return:
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; CHECK-NEXT: ret i32 0
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; CHECK: return2:
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; CHECK-NEXT: ret i32 1
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;
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entry:
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%cmp = icmp slt i64 %idx, 1
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br i1 %cmp, label %for.body, label %return
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for.body:
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%f = load i32, ptr @f, align 4
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%cmp1 = icmp eq i32 %f, 0
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br i1 %cmp1, label %cond.end, label %cond.false
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cond.false:
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br label %cond.end
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cond.end:
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%phi = phi i32 [ %val, %cond.false ], [ 1, %for.body ]
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%cmp.i = icmp sgt i32 %phi, 0
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%sel = select i1 %cmp.i, i32 0, i32 %phi
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%f.idx = getelementptr inbounds i32, ptr @f, i64 %idx
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store i32 %sel, ptr %f.idx, align 4
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%f.reload = load i32, ptr @f, align 4
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%cmp3 = icmp slt i32 %f.reload, 1
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br i1 %cmp3, label %return2, label %return
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return:
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ret i32 0
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return2:
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ret i32 1
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}
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