mirror of
https://github.com/Gericom/teak-llvm.git
synced 2025-06-19 19:45:40 -04:00
c02b237e46
Summary: Calls using invoke in funclet based functions are assumed to clobber all registers, which causes the stack adjustment using pops to consider all registers not defined by the call to be undefined, which can unfortunately include the base pointer, if one is needed. To prevent this (and possibly other hazards), skip reserved registers when looking for candidate registers. This fixes issue #45034 in the Rust compiler. Reviewers: mkuper Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D39636 llvm-svn: 317551
27 lines
609 B
LLVM
27 lines
609 B
LLVM
; RUN: llc < %s | FileCheck %s
|
|
|
|
target triple = "i686--windows-msvc"
|
|
|
|
declare { i8*, i32 } @param2_ret2(i32, i32)
|
|
declare i32 @__CxxFrameHandler3(...)
|
|
|
|
|
|
define void @test_reserved_regs() minsize optsize personality i32 (...)* @__CxxFrameHandler3 {
|
|
; CHECK-LABEL: test_reserved_regs:
|
|
; CHECK: calll _param2_ret2
|
|
; CHECK-NEXT: popl %ecx
|
|
; CHECK-NEXT: popl %edi
|
|
start:
|
|
%s = alloca i64
|
|
store i64 4, i64* %s
|
|
%0 = invoke { i8*, i32 } @param2_ret2(i32 0, i32 1)
|
|
to label %out unwind label %cleanup
|
|
|
|
out:
|
|
ret void
|
|
|
|
cleanup:
|
|
%cp = cleanuppad within none []
|
|
cleanupret from %cp unwind to caller
|
|
}
|