derek.holloway
7502bf64a4
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58 lines
1.7 KiB
LLVM
58 lines
1.7 KiB
LLVM
; Test memchr using SRST, with the correct prototype.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu -no-integrated-as | FileCheck %s
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declare ptr@memchr(ptr %src, i32 %char, i64 %len)
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; Test a simple forwarded call.
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define ptr@f1(i64 %len, ptr %src, i32 %char) {
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; CHECK-LABEL: f1:
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; CHECK-DAG: agr %r2, %r3
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; CHECK-DAG: llcr %r0, %r4
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; CHECK: [[LABEL:\.[^:]*]]:
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; CHECK: srst %r2, %r3
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; CHECK-NEXT: jo [[LABEL]]
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; CHECK: blr %r14
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; CHECK: lghi %r2, 0
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; CHECK: br %r14
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%res = call ptr@memchr(ptr %src, i32 %char, i64 %len)
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ret ptr %res
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}
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; Test a doubled call with no use of %r0 in between. There should be a
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; single load of %r0.
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define ptr@f2(ptr %src, ptr %charptr, i64 %len) {
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; CHECK-LABEL: f2:
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; CHECK: llc %r0, 0(%r3)
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; CHECK-NOT: %r0
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; CHECK: srst [[RES1:%r[1-5]]], %r2
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; CHECK-NOT: %r0
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; CHECK: srst %r2, [[RES1]]
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; CHECK: br %r14
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%char = load volatile i8, ptr %charptr
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%charext = zext i8 %char to i32
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%res1 = call ptr@memchr(ptr %src, i32 %charext, i64 %len)
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%res2 = call ptr@memchr(ptr %res1, i32 %charext, i64 %len)
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ret ptr %res2
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}
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; Test a doubled call with a use of %r0 in between. %r0 must be loaded
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; for each loop.
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define ptr@f3(ptr %src, ptr %charptr, i64 %len) {
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; CHECK-LABEL: f3:
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; CHECK: llc [[CHAR:%r[1-5]]], 0(%r3)
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; CHECK: lr %r0, [[CHAR]]
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; CHECK: srst [[RES1:%r[1-5]]], %r2
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; CHECK: lhi %r0, 0
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; CHECK: blah %r0
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; CHECK: lr %r0, [[CHAR]]
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; CHECK: srst %r2, [[RES1]]
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; CHECK: br %r14
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%char = load volatile i8, ptr %charptr
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%charext = zext i8 %char to i32
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%res1 = call ptr@memchr(ptr %src, i32 %charext, i64 %len)
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call void asm sideeffect "blah $0", "{r0}" (i32 0)
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%res2 = call ptr@memchr(ptr %res1, i32 %charext, i64 %len)
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ret ptr %res2
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}
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