derek.holloway
7502bf64a4
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122 lines
2.7 KiB
LLVM
122 lines
2.7 KiB
LLVM
; Test 64-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 = dso_local global i16 1
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@h = dso_local global i16 1, align 1, section "foo"
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; Check signed comparison.
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define dso_local i64 @f1(i64 %src1) {
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; CHECK-LABEL: f1:
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; CHECK: cghrl %r2, g
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; CHECK-NEXT: blr %r14
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; CHECK: br %r14
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entry:
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%val = load i16, ptr@g
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%src2 = sext i16 %val to i64
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%cond = icmp slt i64 %src1, %src2
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br i1 %cond, label %exit, label %mulb
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mulb:
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%mul = mul i64 %src1, %src1
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br label %exit
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exit:
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%res = phi i64 [ %src1, %entry ], [ %mul, %mulb ]
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ret i64 %res
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}
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; Check unsigned comparison, which cannot use CHRL.
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define dso_local i64 @f2(i64 %src1) {
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; CHECK-LABEL: f2:
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; CHECK-NOT: cghrl
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; CHECK: br %r14
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entry:
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%val = load i16, ptr@g
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%src2 = sext i16 %val to i64
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%cond = icmp ult i64 %src1, %src2
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br i1 %cond, label %exit, label %mulb
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mulb:
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%mul = mul i64 %src1, %src1
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br label %exit
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exit:
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%res = phi i64 [ %src1, %entry ], [ %mul, %mulb ]
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ret i64 %res
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}
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; Check equality.
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define dso_local i64 @f3(i64 %src1) {
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; CHECK-LABEL: f3:
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; CHECK: cghrl %r2, g
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; CHECK-NEXT: ber %r14
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; CHECK: br %r14
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entry:
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%val = load i16, ptr@g
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%src2 = sext i16 %val to i64
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%cond = icmp eq i64 %src1, %src2
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br i1 %cond, label %exit, label %mulb
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mulb:
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%mul = mul i64 %src1, %src1
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br label %exit
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exit:
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%res = phi i64 [ %src1, %entry ], [ %mul, %mulb ]
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ret i64 %res
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}
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; Check inequality.
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define dso_local i64 @f4(i64 %src1) {
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; CHECK-LABEL: f4:
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; CHECK: cghrl %r2, g
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; CHECK-NEXT: blhr %r14
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; CHECK: br %r14
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entry:
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%val = load i16, ptr@g
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%src2 = sext i16 %val to i64
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%cond = icmp ne i64 %src1, %src2
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br i1 %cond, label %exit, label %mulb
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mulb:
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%mul = mul i64 %src1, %src1
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br label %exit
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exit:
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%res = phi i64 [ %src1, %entry ], [ %mul, %mulb ]
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ret i64 %res
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}
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; Repeat f1 with an unaligned address.
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define dso_local i64 @f5(i64 %src1) {
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; CHECK-LABEL: f5:
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; CHECK: lgrl [[REG:%r[0-5]]], h@GOT
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; CHECK: cgh %r2, 0([[REG]])
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; CHECK-NEXT: blr %r14
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; CHECK: br %r14
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entry:
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%val = load i16, ptr@h, align 1
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%src2 = sext i16 %val to i64
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%cond = icmp slt i64 %src1, %src2
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br i1 %cond, label %exit, label %mulb
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mulb:
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%mul = mul i64 %src1, %src1
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br label %exit
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exit:
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%res = phi i64 [ %src1, %entry ], [ %mul, %mulb ]
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ret i64 %res
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}
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; Check the comparison can be reversed if that allows CGHRL to be used.
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define dso_local i64 @f6(i64 %src2) {
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; CHECK-LABEL: f6:
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; CHECK: cghrl %r2, g
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; CHECK-NEXT: bhr %r14
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; CHECK: br %r14
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entry:
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%val = load i16, ptr@g
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%src1 = sext i16 %val to i64
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%cond = icmp slt i64 %src1, %src2
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br i1 %cond, label %exit, label %mulb
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mulb:
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%mul = mul i64 %src2, %src2
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br label %exit
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exit:
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%res = phi i64 [ %src2, %entry ], [ %mul, %mulb ]
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ret i64 %res
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}
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