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.
71 lines
2.0 KiB
LLVM
71 lines
2.0 KiB
LLVM
; Test the allocation of emergency spill slots.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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; For frames of size less than 4096 - 2*160, no emercengy spill slot
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; is required. Check the maximum such case.
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define void @f1(i64 %x) {
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; CHECK-LABEL: f1:
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; CHECK: stg %r2, 160(%r15)
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; CHECK: br %r14
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%y = alloca [471 x i64], align 8
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store volatile i64 %x, ptr %y
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ret void
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}
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; If the frame size is at least 4096 - 2*160, we do need the emergency
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; spill slots. Check the minimum such case.
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define void @f2(i64 %x) {
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; CHECK-LABEL: f2:
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; CHECK: stg %r2, 176(%r15)
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; CHECK: br %r14
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%y = alloca [472 x i64], align 8
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store volatile i64 %x, ptr %y
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ret void
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}
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; However, if there are incoming stack arguments, those also need to be
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; in reach, so the maximum frame size without emergency spill slots is
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; 4096 - 2*160 - <size of incoming stack arguments>. Check the maximum
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; case where we still need no emergency spill slots ...
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define void @f3(i64 %x, i64 %r3, i64 %r4, i64 %r5, i64 %r6, i64 %stack) {
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; CHECK-LABEL: f3:
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; CHECK: stg %r2, 160(%r15)
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; CHECK: br %r14
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%y = alloca [470 x i64], align 8
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store volatile i64 %x, ptr %y
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ret void
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}
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; ... and the minimum case where we do.
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define void @f4(i64 %x, i64 %r3, i64 %r4, i64 %r5, i64 %r6, i64 %stack) {
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; CHECK-LABEL: f4:
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; CHECK: stg %r2, 176(%r15)
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; CHECK: br %r14
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%y = alloca [471 x i64], align 8
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store volatile i64 %x, ptr %y
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ret void
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}
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; Try again for the case of two stack arguments.
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; Check the maximum case where we still need no emergency spill slots ...
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define void @f5(i64 %x, i64 %r3, i64 %r4, i64 %r5, i64 %r6, i64 %stack1, i64 %stack2) {
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; CHECK-LABEL: f5:
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; CHECK: stg %r2, 160(%r15)
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; CHECK: br %r14
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%y = alloca [469 x i64], align 8
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store volatile i64 %x, ptr %y
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ret void
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}
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; ... and the minimum case where we do.
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define void @f6(i64 %x, i64 %r3, i64 %r4, i64 %r5, i64 %r6, i64 %stack1, i64 %stack2) {
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; CHECK-LABEL: f6:
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; CHECK: stg %r2, 176(%r15)
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; CHECK: br %r14
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%y = alloca [470 x i64], align 8
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store volatile i64 %x, ptr %y
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ret void
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}
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