mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-15 20:29:48 +00:00
0df9abbd63
The -tailcallelim pass should be checking if byval or inalloca args can be captured before marking calls as tail calls. This was the real root cause of PR7272. With a better fix in place, revert the inliner change from r105255. The test case it introduced still passes and has been moved to test/Transforms/Inline/byval-tail-call.ll. Reviewers: chandlerc Differential Revision: http://reviews.llvm.org/D3403 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206789 91177308-0d34-0410-b5e6-96231b3b80d8
39 lines
1020 B
LLVM
39 lines
1020 B
LLVM
; RUN: opt < %s -tailcallelim -inline -instcombine -dse -S | FileCheck %s
|
|
; PR7272
|
|
|
|
; Calls that capture byval parameters cannot be marked as tail calls. Other
|
|
; tails that don't capture byval parameters can still be tail calls.
|
|
|
|
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32-n8:16:32"
|
|
target triple = "i386-pc-linux-gnu"
|
|
|
|
declare void @ext(i32*)
|
|
|
|
define void @bar(i32* byval %x) {
|
|
call void @ext(i32* %x)
|
|
ret void
|
|
}
|
|
|
|
define void @foo(i32* %x) {
|
|
; CHECK-LABEL: define void @foo(
|
|
; CHECK: llvm.lifetime.start
|
|
; CHECK: store i32 %2, i32* %x
|
|
call void @bar(i32* byval %x)
|
|
ret void
|
|
}
|
|
|
|
define internal void @qux(i32* byval %x) {
|
|
call void @ext(i32* %x)
|
|
tail call void @ext(i32* null)
|
|
ret void
|
|
}
|
|
define void @frob(i32* %x) {
|
|
; CHECK-LABEL: define void @frob(
|
|
; CHECK: alloca i32
|
|
; CHECK: {{^ *}}call void @ext(
|
|
; CHECK: tail call void @ext(i32* null)
|
|
; CHECK: ret void
|
|
tail call void @qux(i32* byval %x)
|
|
ret void
|
|
}
|