a1710eb3cd
The LIT test cases were migrated with the script provided by Nikita Popov. No manual changes were made. Committed without review since no functional changes, after consultation with uweigand.
67 lines
2.0 KiB
LLVM
67 lines
2.0 KiB
LLVM
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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; Parameter with swiftself should be allocated to r10.
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; CHECK-LABEL: swiftself_param:
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; CHECK: lgr %r2, %r10
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define ptr@swiftself_param(ptr swiftself %addr0) {
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ret ptr %addr0
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}
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; Check that r10 is used to pass a swiftself argument.
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; CHECK-LABEL: call_swiftself:
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; CHECK: lgr %r10, %r2
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; CHECK: brasl %r14, swiftself_param
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define ptr@call_swiftself(ptr %arg) {
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%res = call ptr@swiftself_param(ptr swiftself %arg)
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ret ptr %res
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}
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; r10 should be saved by the callee even if used for swiftself
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; CHECK-LABEL: swiftself_clobber:
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; CHECK: stmg %r10,
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; ...
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; CHECK: lmg %r10,
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; CHECK: br %r14
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define ptr@swiftself_clobber(ptr swiftself %addr0) {
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call void asm sideeffect "", "~{r10}"()
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ret ptr %addr0
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}
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; Demonstrate that we do not need any loads when calling multiple functions
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; with swiftself argument.
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; CHECK-LABEL: swiftself_passthrough:
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; CHECK-NOT: lg{{.*}}r10,
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; CHECK: brasl %r14, swiftself_param
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; CHECK-NOT: lg{{.*}}r10,
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; CHECK-NEXT: brasl %r14, swiftself_param
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define void @swiftself_passthrough(ptr swiftself %addr0) {
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call ptr@swiftself_param(ptr swiftself %addr0)
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call ptr@swiftself_param(ptr swiftself %addr0)
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ret void
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}
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; Normally, we can use a tail call if the callee swiftself is the same as the
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; caller one. Not yet supported on SystemZ.
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; CHECK-LABEL: swiftself_tail:
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; CHECK: lgr %r[[REG1:[0-9]+]], %r10
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; CHECK: lgr %r10, %r[[REG1]]
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; CHECK: brasl %r14, swiftself_param
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; CHECK: br %r14
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define ptr @swiftself_tail(ptr swiftself %addr0) {
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call void asm sideeffect "", "~{r10}"()
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%res = tail call ptr @swiftself_param(ptr swiftself %addr0)
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ret ptr %res
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}
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; We can not use a tail call if the callee swiftself is not the same as the
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; caller one.
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; CHECK-LABEL: swiftself_notail:
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; CHECK: lgr %r10, %r2
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; CHECK: brasl %r14, swiftself_param
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; CHECK: lmg %r10,
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; CHECK: br %r14
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define ptr @swiftself_notail(ptr swiftself %addr0, ptr %addr1) nounwind {
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%res = tail call ptr @swiftself_param(ptr swiftself %addr1)
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ret ptr %res
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}
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