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TheRock/compiler/amd-llvm/llvm/test/Transforms/LowerSwitch/2014-06-23-PHIlowering.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

41 lines
823 B
LLVM

; RUN: opt < %s -passes=lower-switch -S | FileCheck %s
define i32 @test(i32 %arg) #0 {
; CHECK-LABEL: @test
; CHECK: 2:
; CHECK-NEXT: %res.0 = phi i32 [ 1, %NodeBlock ], [ 2, %1 ]
; CHECK-NEXT: br label %3
; CHECK: 5:
; CHECK-NEXT: %res.3 = phi i32 [ 0, %LeafBlock1 ], [ %res.2, %4 ], [ 0, %LeafBlock ]
; CHECK-NEXT: %6 = add nsw i32 %res.3, 1
; CHECK-NEXT: ret i32 %6
switch i32 %arg, label %5 [
i32 1, label %1
i32 2, label %2
i32 3, label %3
i32 4, label %4
]
1:
br label %2
2:
%res.0 = phi i32 [ 1, %0 ], [ 2, %1 ]
br label %3
3:
%res.1 = phi i32 [ 0, %0 ], [ %res.0, %2 ]
%phitmp = add nsw i32 %res.1, 2
br label %4
4:
%res.2 = phi i32 [ 1, %0 ], [ %phitmp, %3 ]
br label %5
5:
%res.3 = phi i32 [ 0, %0 ], [ %res.2, %4 ]
%6 = add nsw i32 %res.3, 1
ret i32 %6
}