llvm-6502/test/CodeGen/SystemZ/args-05.ll
Ulrich Weigand b503b49b51 [SystemZ] Add CodeGen test cases
This adds all CodeGen tests for the SystemZ target.

This version of the patch incorporates feedback from a review by
Sean Silva.  Thanks to all reviewers!

Patch by Richard Sandiford.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181204 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-06 16:17:29 +00:00

48 lines
1.2 KiB
LLVM

; Test that we take advantage of signext and zeroext annotations.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
; Zero extension of something that is already zero-extended.
define void @f1(i32 zeroext %r2, i64 *%r3) {
; CHECK: f1:
; CHECK-NOT: %r2
; CHECK: stg %r2, 0(%r3)
; CHECK: br %r14
%conv = zext i32 %r2 to i64
store i64 %conv, i64* %r3
ret void
}
; Sign extension of something that is already sign-extended.
define void @f2(i32 signext %r2, i64 *%r3) {
; CHECK: f2:
; CHECK-NOT: %r2
; CHECK: stg %r2, 0(%r3)
; CHECK: br %r14
%conv = sext i32 %r2 to i64
store i64 %conv, i64* %r3
ret void
}
; Sign extension of something that is already zero-extended.
define void @f3(i32 zeroext %r2, i64 *%r3) {
; CHECK: f3:
; CHECK: lgfr [[REGISTER:%r[0-5]+]], %r2
; CHECK: stg [[REGISTER]], 0(%r3)
; CHECK: br %r14
%conv = sext i32 %r2 to i64
store i64 %conv, i64* %r3
ret void
}
; Zero extension of something that is already sign-extended.
define void @f4(i32 signext %r2, i64 *%r3) {
; CHECK: f4:
; CHECK: llgfr [[REGISTER:%r[0-5]+]], %r2
; CHECK: stg [[REGISTER]], 0(%r3)
; CHECK: br %r14
%conv = zext i32 %r2 to i64
store i64 %conv, i64* %r3
ret void
}