derek.holloway
7502bf64a4
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117 lines
2.6 KiB
LLVM
117 lines
2.6 KiB
LLVM
; Test 64-bit comparisons in which the second operand is a PC-relative
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; variable.
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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 i64 1
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@h = dso_local global i64 1, align 4, section "foo"
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; Check signed comparisons.
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define dso_local i64 @f1(i64 %src1) {
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; CHECK-LABEL: f1:
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; CHECK: cgrl %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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%src2 = load i64, ptr@g
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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 comparisons.
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define dso_local i64 @f2(i64 %src1) {
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; CHECK-LABEL: f2:
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; CHECK: clgrl %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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%src2 = load i64, ptr@g
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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, which can use CRL or CLRL.
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define dso_local i64 @f3(i64 %src1) {
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; CHECK-LABEL: f3:
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; CHECK: c{{l?}}grl %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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%src2 = load i64, ptr@g
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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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; ...likewise inequality.
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define dso_local i64 @f4(i64 %src1) {
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; CHECK-LABEL: f4:
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; CHECK: c{{l?}}grl %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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%src2 = load i64, ptr@g
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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: larl [[REG:%r[0-5]]], h
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; CHECK: cg %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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%src2 = load i64, ptr@h, align 4
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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 CGRL 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: cgrl %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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%src1 = load i64, ptr@g
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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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