85 lines
2.2 KiB
LLVM
85 lines
2.2 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -jump-threading -S < %s | FileCheck %s
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@x = global i32 0
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@y = global i32 0
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declare void @f()
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declare void @g()
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define i32 @pre(i1 %cond, i32 %n) {
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; CHECK-LABEL: @pre(
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; CHECK-NEXT: br i1 [[COND:%.*]], label [[C_THREAD:%.*]], label [[C:%.*]]
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; CHECK: C.thread:
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; CHECK-NEXT: store i32 0, i32* @x, align 4
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; CHECK-NEXT: br label [[YES:%.*]]
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; CHECK: C:
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; CHECK-NEXT: [[A_PR:%.*]] = load i32, i32* @y, align 4
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; CHECK-NEXT: [[COND2:%.*]] = icmp eq i32 [[A_PR]], 0
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; CHECK-NEXT: br i1 [[COND2]], label [[YES]], label [[NO:%.*]]
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; CHECK: YES:
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; CHECK-NEXT: [[A4:%.*]] = phi i32 [ 0, [[C_THREAD]] ], [ [[A_PR]], [[C]] ]
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; CHECK-NEXT: call void @f()
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; CHECK-NEXT: ret i32 [[A4]]
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; CHECK: NO:
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; CHECK-NEXT: call void @g()
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; CHECK-NEXT: ret i32 1
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;
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br i1 %cond, label %A, label %B
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A:
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store i32 0, i32* @x
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br label %C
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B:
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br label %C
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C:
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%ptr = phi i32* [@x, %A], [@y, %B]
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%a = load i32, i32* %ptr
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%cond2 = icmp eq i32 %a, 0
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br i1 %cond2, label %YES, label %NO
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YES:
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call void @f()
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ret i32 %a
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NO:
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call void @g()
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ret i32 1
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}
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define i32 @pre_freeze(i1 %cond, i32 %n) {
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; CHECK-LABEL: @pre_freeze(
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; CHECK-NEXT: br i1 [[COND:%.*]], label [[C_THREAD:%.*]], label [[C:%.*]]
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; CHECK: C.thread:
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; CHECK-NEXT: store i32 0, i32* @x, align 4
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; CHECK-NEXT: br label [[YES:%.*]]
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; CHECK: C:
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; CHECK-NEXT: [[A_PR:%.*]] = load i32, i32* @y, align 4
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; CHECK-NEXT: [[COND2:%.*]] = icmp eq i32 [[A_PR]], 0
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; CHECK-NEXT: [[COND2_FR:%.*]] = freeze i1 [[COND2]]
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; CHECK-NEXT: br i1 [[COND2_FR]], label [[YES]], label [[NO:%.*]]
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; CHECK: YES:
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; CHECK-NEXT: [[A5:%.*]] = phi i32 [ 0, [[C_THREAD]] ], [ [[A_PR]], [[C]] ]
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; CHECK-NEXT: call void @f()
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; CHECK-NEXT: ret i32 [[A5]]
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; CHECK: NO:
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; CHECK-NEXT: call void @g()
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; CHECK-NEXT: ret i32 1
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;
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br i1 %cond, label %A, label %B
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A:
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store i32 0, i32* @x
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br label %C
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B:
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br label %C
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C:
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%ptr = phi i32* [@x, %A], [@y, %B]
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%a = load i32, i32* %ptr
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%cond2 = icmp eq i32 %a, 0
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%cond2.fr = freeze i1 %cond2
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br i1 %cond2.fr, label %YES, label %NO
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YES:
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call void @f()
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ret i32 %a
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NO:
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call void @g()
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ret i32 1
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}
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