mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-31 07:52:55 +01:00
33 lines
1.1 KiB
LLVM
33 lines
1.1 KiB
LLVM
|
; RUN: llc -march=x86 -o - < %s | FileCheck %s
|
||
|
|
||
|
; This used to be classified as a tail call because of a mismatch in the
|
||
|
; arguments seen by Analysis.cpp and ISelLowering. As seen by ISelLowering, they
|
||
|
; both return {i32, i32, i32} (since i64 is illegal) which is fine for a tail
|
||
|
; call.
|
||
|
|
||
|
; As seen by Analysis.cpp: i64 -> i32 is a valid trunc, second i32 passes
|
||
|
; straight through and the third is undef, also OK for a tail call.
|
||
|
|
||
|
; Analysis.cpp was wrong.
|
||
|
|
||
|
; FIXME: in principle we *could* support some tail calls involving truncations
|
||
|
; of illegal types: a single "trunc i64 %whatever to i32" is probably valid
|
||
|
; because of how the extra registers are laid out.
|
||
|
|
||
|
declare {i64, i32} @test()
|
||
|
|
||
|
define {i32, i32, i32} @test_pair_notail(i64 %in) {
|
||
|
; CHECK-LABEL: test_pair_notail
|
||
|
; CHECK-NOT: jmp
|
||
|
|
||
|
%whole = tail call {i64, i32} @test()
|
||
|
%first = extractvalue {i64, i32} %whole, 0
|
||
|
%first.trunc = trunc i64 %first to i32
|
||
|
|
||
|
%second = extractvalue {i64, i32} %whole, 1
|
||
|
|
||
|
%tmp = insertvalue {i32, i32, i32} undef, i32 %first.trunc, 0
|
||
|
%res = insertvalue {i32, i32, i32} %tmp, i32 %second, 1
|
||
|
ret {i32, i32, i32} %res
|
||
|
}
|