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TheRock/compiler/amd-llvm/llvm/test/Transforms/CodeGenPrepare/X86/split-indirect-loop.ll
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derek.holloway 7502bf64a4
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2026-09-02 16:34:47 -07:00

38 lines
968 B
LLVM

; RUN: opt -passes='require<profile-summary>,function(codegenprepare)' -S -mtriple=x86_64 < %s | FileCheck %s
; Test that an invalid CFG is not created by splitIndirectCriticalEdges
; transformation when the 'target' block is a loop to itself.
; CHECK: .split:
; CHECK: br label %while.body.clone
; CHECK: if.else1:
; CHECK: indirectbr
; CHECK: while.body.clone:
; CHECK: br label %.split
define void @test(i1 %c) {
entry:
br label %if.else
if.else:
br i1 %c, label %while.body, label %preheader
preheader:
br label %if.else1
if.then:
unreachable
while.body:
%dest.sroa = phi i32 [ %1, %while.body ], [ undef, %if.else1 ], [ undef, %if.else ]
%0 = inttoptr i32 %dest.sroa to ptr
%incdec.ptr = getelementptr inbounds i8, ptr %0, i32 -1
%1 = ptrtoint ptr %incdec.ptr to i32
store i8 undef, ptr %incdec.ptr, align 1
br label %while.body
if.else1:
indirectbr ptr undef, [label %if.then, label %while.body, label %if.else, label %if.else1]
}