| ; RUN: llc -mtriple=i686-- -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 |
| } |
