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llvm-mirror/test/CodeGen/SystemZ/asm-02.ll
Ulrich Weigand 1431b3c2f5 [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.

llvm-svn: 181204
2013-05-06 16:17:29 +00:00

53 lines
1.2 KiB
LLVM

; Test the "R" asm constraint, which accepts addresses that have a base,
; an index and a 12-bit displacement.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
; Check the lowest range.
define void @f1(i64 %base) {
; CHECK: f1:
; CHECK: blah 0(%r2)
; CHECK: br %r14
%addr = inttoptr i64 %base to i64 *
call void asm "blah $0", "=*R" (i64 *%addr)
ret void
}
; Check the next lowest byte.
define void @f2(i64 %base) {
; CHECK: f2:
; CHECK: aghi %r2, -1
; CHECK: blah 0(%r2)
; CHECK: br %r14
%add = add i64 %base, -1
%addr = inttoptr i64 %add to i64 *
call void asm "blah $0", "=*R" (i64 *%addr)
ret void
}
; Check the highest range.
define void @f3(i64 %base) {
; CHECK: f3:
; CHECK: blah 4095(%r2)
; CHECK: br %r14
%add = add i64 %base, 4095
%addr = inttoptr i64 %add to i64 *
call void asm "blah $0", "=*R" (i64 *%addr)
ret void
}
; Check the next highest byte.
define void @f4(i64 %base) {
; CHECK: f4:
; CHECK: aghi %r2, 4096
; CHECK: blah 0(%r2)
; CHECK: br %r14
%add = add i64 %base, 4096
%addr = inttoptr i64 %add to i64 *
call void asm "blah $0", "=*R" (i64 *%addr)
ret void
}
; FIXME: at the moment the precise constraint is not passed down to
; target code, so we must conservatively treat "R" as "Q".