mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-21 16:31:16 +00:00
8f3817f505
adjacent uses of a dead basic block from the same user. This fixes PR5596. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89658 91177308-0d34-0410-b5e6-96231b3b80d8
31 lines
622 B
LLVM
31 lines
622 B
LLVM
; RUN: opt < %s -S -ipsccp | FileCheck %s
|
|
; PR5596
|
|
|
|
; IPSCCP should propagate the 0 argument, eliminate the switch, and propagate
|
|
; the result.
|
|
|
|
; CHECK: define i32 @main() noreturn nounwind {
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: %call2 = tail call i32 @wwrite(i64 0) nounwind
|
|
; CHECK-NEXT: ret i32 123
|
|
|
|
define i32 @main() noreturn nounwind {
|
|
entry:
|
|
%call2 = tail call i32 @wwrite(i64 0) nounwind
|
|
ret i32 %call2
|
|
}
|
|
|
|
define internal i32 @wwrite(i64 %i) nounwind readnone {
|
|
entry:
|
|
switch i64 %i, label %sw.default [
|
|
i64 3, label %return
|
|
i64 10, label %return
|
|
]
|
|
|
|
sw.default:
|
|
ret i32 123
|
|
|
|
return:
|
|
ret i32 0
|
|
}
|