llvm-6502/test/CodeGen/SystemZ/int-cmp-39.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

82 lines
1.7 KiB
LLVM

; Test 64-bit comparisons in which the second operand is sign-extended
; from a PC-relative i16.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
@g = global i16 1
; Check signed comparison.
define i64 @f1(i64 %src1) {
; CHECK: f1:
; CHECK: cghrl %r2, g
; CHECK-NEXT: j{{g?}}l
; CHECK: br %r14
entry:
%val = load i16 *@g
%src2 = sext i16 %val to i64
%cond = icmp slt i64 %src1, %src2
br i1 %cond, label %exit, label %mulb
mulb:
%mul = mul i64 %src1, %src1
br label %exit
exit:
%res = phi i64 [ %src1, %entry ], [ %mul, %mulb ]
ret i64 %res
}
; Check unsigned comparison, which cannot use CHRL.
define i64 @f2(i64 %src1) {
; CHECK: f2:
; CHECK-NOT: cghrl
; CHECK: br %r14
entry:
%val = load i16 *@g
%src2 = sext i16 %val to i64
%cond = icmp ult i64 %src1, %src2
br i1 %cond, label %exit, label %mulb
mulb:
%mul = mul i64 %src1, %src1
br label %exit
exit:
%res = phi i64 [ %src1, %entry ], [ %mul, %mulb ]
ret i64 %res
}
; Check equality.
define i64 @f3(i64 %src1) {
; CHECK: f3:
; CHECK: cghrl %r2, g
; CHECK-NEXT: j{{g?}}e
; CHECK: br %r14
entry:
%val = load i16 *@g
%src2 = sext i16 %val to i64
%cond = icmp eq i64 %src1, %src2
br i1 %cond, label %exit, label %mulb
mulb:
%mul = mul i64 %src1, %src1
br label %exit
exit:
%res = phi i64 [ %src1, %entry ], [ %mul, %mulb ]
ret i64 %res
}
; Check inequality.
define i64 @f4(i64 %src1) {
; CHECK: f4:
; CHECK: cghrl %r2, g
; CHECK-NEXT: j{{g?}}lh
; CHECK: br %r14
entry:
%val = load i16 *@g
%src2 = sext i16 %val to i64
%cond = icmp ne i64 %src1, %src2
br i1 %cond, label %exit, label %mulb
mulb:
%mul = mul i64 %src1, %src1
br label %exit
exit:
%res = phi i64 [ %src1, %entry ], [ %mul, %mulb ]
ret i64 %res
}