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TheRock/compiler/amd-llvm/llvm/test/Transforms/SimplifyCFG/DeadSetCC.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

42 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 -switch-range-to-icmp -S | FileCheck %s
; Check that simplifycfg deletes a dead 'seteq' instruction when it
; folds a conditional branch into a switch instruction.
declare void @foo()
declare void @bar()
define void @testcfg(i32 %V) {
; CHECK-LABEL: @testcfg(
; CHECK-NEXT: [[V_OFF:%.*]] = add i32 [[V:%.*]], -15
; CHECK-NEXT: [[SWITCH:%.*]] = icmp ult i32 [[V_OFF]], 2
; CHECK-NEXT: br i1 [[SWITCH]], label [[L2:%.*]], label [[L1:%.*]]
; CHECK: common.ret:
; CHECK-NEXT: ret void
; CHECK: L1:
; CHECK-NEXT: call void @foo()
; CHECK-NEXT: br label [[COMMON_RET:%.*]]
; CHECK: L2:
; CHECK-NEXT: call void @bar()
; CHECK-NEXT: br label [[COMMON_RET]]
;
%C = icmp eq i32 %V, 18
%D = icmp eq i32 %V, 180
%E = or i1 %C, %D
br i1 %E, label %L1, label %Sw
Sw: ; preds = %0
switch i32 %V, label %L1 [
i32 15, label %L2
i32 16, label %L2
]
L1: ; preds = %Sw, %0
call void @foo( )
ret void
L2: ; preds = %Sw, %Sw
call void @bar( )
ret void
}