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TheRock/compiler/amd-llvm/llvm/test/CodeGen/X86/branchfolding-landingpads.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

46 lines
1.3 KiB
LLVM

; RUN: llc %s -o - -verify-machineinstrs | FileCheck %s
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-unknown"
; The machine level BranchFolding pass will try to remove the 'unreachable' block
; and rewrite 'entry' to jump to the block 'unreachable' falls through to.
; That will be a landing pad and result in 'entry' jumping to 2 landing pads.
; This tests that we don't do this change when the fallthrough is itself a landing
; pad.
declare i32 @__gxx_personality_v0(...)
declare void @foo()
; Function Attrs: noreturn
declare void @_throw()
; CHECK-LABEL: @main
; CHECK: %unreachable
define i32 @main(ptr %cleanup) personality ptr @__gxx_personality_v0 {
entry:
invoke void @_throw() #0
to label %unreachable unwind label %catch.dispatch9
catch.dispatch9: ; preds = %entry
%tmp13 = landingpad { ptr, i32 }
cleanup
catch ptr null
invoke void @_throw() #0
to label %unreachable unwind label %lpad31
lpad31: ; preds = %catch.dispatch9
%tmp20 = landingpad { ptr, i32 }
cleanup
catch ptr null
call void @foo()
unreachable
unreachable: ; preds = %catch.dispatch9, %entry
unreachable
}
attributes #0 = { noreturn }