2013-05-07 00:17:29 +08:00
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; Test 32-bit comparisons in which the second operand is sign-extended
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; from a PC-relative i16.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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@g = global i16 1
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2013-05-30 17:45:42 +08:00
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@h = global i16 1, align 1, section "foo"
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2013-05-07 00:17:29 +08:00
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; Check signed comparison.
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define i32 @f1(i32 %src1) {
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2013-07-14 14:24:09 +08:00
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; CHECK-LABEL: f1:
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2013-05-07 00:17:29 +08:00
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; CHECK: chrl %r2, g
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2016-04-08 00:11:44 +08:00
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; CHECK-NEXT: blr %r14
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2013-05-07 00:17:29 +08:00
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; CHECK: br %r14
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entry:
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2018-07-20 20:12:10 +08:00
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%val = load i16, i16 *@g
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2013-05-07 00:17:29 +08:00
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%src2 = sext i16 %val to i32
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%cond = icmp slt i32 %src1, %src2
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br i1 %cond, label %exit, label %mulb
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mulb:
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%mul = mul i32 %src1, %src1
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br label %exit
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exit:
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%res = phi i32 [ %src1, %entry ], [ %mul, %mulb ]
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ret i32 %res
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}
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; Check unsigned comparison, which cannot use CHRL.
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define i32 @f2(i32 %src1) {
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2013-07-14 14:24:09 +08:00
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; CHECK-LABEL: f2:
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2013-05-07 00:17:29 +08:00
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; CHECK-NOT: chrl
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; CHECK: br %r14
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entry:
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2018-07-20 20:12:10 +08:00
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%val = load i16, i16 *@g
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2013-05-07 00:17:29 +08:00
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%src2 = sext i16 %val to i32
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%cond = icmp ult i32 %src1, %src2
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br i1 %cond, label %exit, label %mulb
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mulb:
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%mul = mul i32 %src1, %src1
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br label %exit
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exit:
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%res = phi i32 [ %src1, %entry ], [ %mul, %mulb ]
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ret i32 %res
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}
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; Check equality.
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define i32 @f3(i32 %src1) {
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2013-07-14 14:24:09 +08:00
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; CHECK-LABEL: f3:
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2013-05-07 00:17:29 +08:00
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; CHECK: chrl %r2, g
|
2016-04-08 00:11:44 +08:00
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; CHECK-NEXT: ber %r14
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2013-05-07 00:17:29 +08:00
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; CHECK: br %r14
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entry:
|
2018-07-20 20:12:10 +08:00
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%val = load i16, i16 *@g
|
2013-05-07 00:17:29 +08:00
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%src2 = sext i16 %val to i32
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%cond = icmp eq i32 %src1, %src2
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br i1 %cond, label %exit, label %mulb
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mulb:
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%mul = mul i32 %src1, %src1
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br label %exit
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exit:
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%res = phi i32 [ %src1, %entry ], [ %mul, %mulb ]
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ret i32 %res
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}
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; Check inequality.
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define i32 @f4(i32 %src1) {
|
2013-07-14 14:24:09 +08:00
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; CHECK-LABEL: f4:
|
2013-05-07 00:17:29 +08:00
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; CHECK: chrl %r2, g
|
2016-04-08 00:11:44 +08:00
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; CHECK-NEXT: blhr %r14
|
2013-05-07 00:17:29 +08:00
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; CHECK: br %r14
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entry:
|
2018-07-20 20:12:10 +08:00
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|
%val = load i16, i16 *@g
|
2013-05-07 00:17:29 +08:00
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%src2 = sext i16 %val to i32
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%cond = icmp ne i32 %src1, %src2
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br i1 %cond, label %exit, label %mulb
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mulb:
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%mul = mul i32 %src1, %src1
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br label %exit
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exit:
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%res = phi i32 [ %src1, %entry ], [ %mul, %mulb ]
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ret i32 %res
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}
|
2013-05-30 17:45:42 +08:00
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; Repeat f1 with an unaligned address.
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define i32 @f5(i32 %src1) {
|
2013-07-14 14:24:09 +08:00
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; CHECK-LABEL: f5:
|
2013-05-30 17:45:42 +08:00
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; CHECK: lgrl [[REG:%r[0-5]]], h@GOT
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|
; CHECK: ch %r2, 0([[REG]])
|
2016-04-08 00:11:44 +08:00
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|
|
; CHECK-NEXT: blr %r14
|
2013-05-30 17:45:42 +08:00
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|
|
; CHECK: br %r14
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entry:
|
2018-07-20 20:12:10 +08:00
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|
|
%val = load i16, i16 *@h, align 1
|
2013-05-30 17:45:42 +08:00
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|
%src2 = sext i16 %val to i32
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%cond = icmp slt i32 %src1, %src2
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|
br i1 %cond, label %exit, label %mulb
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mulb:
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%mul = mul i32 %src1, %src1
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|
br label %exit
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exit:
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%res = phi i32 [ %src1, %entry ], [ %mul, %mulb ]
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|
ret i32 %res
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}
|
2013-08-23 19:27:19 +08:00
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|
|
|
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|
|
; Check the comparison can be reversed if that allows CHRL to be used.
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|
|
|
define i32 @f6(i32 %src2) {
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|
|
|
; CHECK-LABEL: f6:
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|
|
; CHECK: chrl %r2, g
|
2016-04-08 00:11:44 +08:00
|
|
|
; CHECK-NEXT: bhr %r14
|
2013-08-23 19:27:19 +08:00
|
|
|
; CHECK: br %r14
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|
|
|
entry:
|
2018-07-20 20:12:10 +08:00
|
|
|
%val = load i16, i16 *@g
|
2013-08-23 19:27:19 +08:00
|
|
|
%src1 = sext i16 %val to i32
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|
|
|
%cond = icmp slt i32 %src1, %src2
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|
|
|
br i1 %cond, label %exit, label %mulb
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|
|
|
mulb:
|
|
|
|
%mul = mul i32 %src2, %src2
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|
|
|
br label %exit
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|
|
|
exit:
|
|
|
|
%res = phi i32 [ %src2, %entry ], [ %mul, %mulb ]
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|
|
|
ret i32 %res
|
|
|
|
}
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