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73 lines
1.7 KiB
LLVM
73 lines
1.7 KiB
LLVM
; Test strcmp using CLST, i64 version.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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declare i64 @strcmp(i8 *%src1, i8 *%src2)
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; Check a case where the result is used as an integer.
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define i64 @f1(i8 *%src1, i8 *%src2) {
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; CHECK-LABEL: f1:
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; CHECK: lhi %r0, 0
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; CHECK: [[LABEL:\.[^:]*]]:
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; CHECK: clst %r2, %r3
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; CHECK-NEXT: jo [[LABEL]]
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; CHECK-NEXT: BB#{{[0-9]+}}
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; CHECK-NEXT: ipm [[REG:%r[0-5]]]
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; CHECK: srl [[REG]], 28
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; CHECK: rll [[REG]], [[REG]], 31
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; CHECK: lgfr %r2, [[REG]]
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; CHECK: br %r14
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%res = call i64 @strcmp(i8 *%src1, i8 *%src2)
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ret i64 %res
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}
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; Check a case where the result is tested for equality.
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define void @f2(i8 *%src1, i8 *%src2, i64 *%dest) {
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; CHECK-LABEL: f2:
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; CHECK: lhi %r0, 0
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; CHECK: [[LABEL:\.[^:]*]]:
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; CHECK: clst %r2, %r3
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; CHECK-NEXT: jo [[LABEL]]
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; CHECK-NEXT: BB#{{[0-9]+}}
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; CHECK-NEXT: je {{\.L.*}}
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; CHECK: br %r14
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%res = call i64 @strcmp(i8 *%src1, i8 *%src2)
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%cmp = icmp eq i64 %res, 0
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br i1 %cmp, label %exit, label %store
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store:
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store i64 0, i64 *%dest
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br label %exit
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exit:
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ret void
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}
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; Test a case where the result is used both as an integer and for
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; branching.
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define i64 @f3(i8 *%src1, i8 *%src2, i64 *%dest) {
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; CHECK-LABEL: f3:
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; CHECK: lhi %r0, 0
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; CHECK: [[LABEL:\.[^:]*]]:
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; CHECK: clst %r2, %r3
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; CHECK-NEXT: jo [[LABEL]]
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; CHECK-NEXT: BB#{{[0-9]+}}
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; CHECK-NEXT: ipm [[REG:%r[0-5]]]
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; CHECK: srl [[REG]], 28
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; CHECK: rll [[REG]], [[REG]], 31
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; CHECK: lgfr %r2, [[REG]]
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; CHECK: jl {{\.L*}}
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; CHECK: br %r14
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entry:
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%res = call i64 @strcmp(i8 *%src1, i8 *%src2)
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%cmp = icmp slt i64 %res, 0
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br i1 %cmp, label %exit, label %store
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store:
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store i64 0, i64 *%dest
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br label %exit
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exit:
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ret i64 %res
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}
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