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TheRock/compiler/amd-llvm/llvm/test/Transforms/SimplifyCFG/simplifyUnreachable-degenerate-conditional-branch-with-matching-destinations.ll
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derek.holloway 7502bf64a4
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Flatten subprojects into a single base monorepo
2026-09-02 16:34:47 -07:00

38 lines
1.2 KiB
LLVM

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -passes=simplifycfg -simplifycfg-require-and-preserve-domtree=1 < %s | FileCheck %s
@global = external global i16, align 1
@global.1 = external global i16, align 1
@global.2 = external global i16, align 1
define void @widget() {
; CHECK-LABEL: @widget(
; CHECK-NEXT: bb:
; CHECK-NEXT: unreachable
;
bb:
%i = load i16, ptr @global, align 1
%i13 = icmp ne i16 %i, 0
br i1 %i13, label %bb16, label %bb14
bb14: ; preds = %bb
%i15 = load i16, ptr @global.1, align 1
br label %bb23
bb16: ; preds = %bb
%i17 = load i16, ptr @global, align 1
%i18 = sdiv i16 2, %i17
%i19 = icmp ne i16 %i18, 0
%i20 = zext i1 %i19 to i16
%i21 = load i16, ptr @global.1, align 1
br i1 %i19, label %bb22, label %bb23
bb22: ; preds = %bb16
br label %bb23
bb23: ; preds = %bb22, %bb16, %bb14
%i24 = phi i16 [ %i20, %bb22 ], [ %i21, %bb16 ], [ %i15, %bb14 ]
store i16 %i24, ptr @global.2, align 1
unreachable
}