01061ed370
The SystemZ implementation of shouldCoalesce() is merely a workaround for the fact that regalloc can run out of registers when extending 128-bit intervals with subreg (GPR64/GPR32) COPYs. This patch adds more freedom to the coalescer as it now only checks that the subreg interval is local to MBB and does not have too many physreg clobbers.
29 lines
1.0 KiB
LLVM
29 lines
1.0 KiB
LLVM
; Test long double atomic exchange.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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define void @f1(ptr align 16 %ret, ptr align 16 %src, ptr align 16 %b) {
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; CHECK-LABEL: f1:
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; CHECK: lg %r1, 8(%r4)
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; CHECK-NEXT: lg %r0, 0(%r4)
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; CHECK-NEXT: lg %r4, 8(%r3)
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; CHECK-NEXT: lg %r5, 0(%r3)
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; CHECK-NEXT:.LBB0_1: # %atomicrmw.start
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; CHECK-NEXT: # =>This Inner Loop Header: Depth=1
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; CHECK-NEXT: lgr %r12, %r5
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; CHECK-NEXT: lgr %r13, %r4
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; CHECK-NEXT: cdsg %r12, %r0, 0(%r3)
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; CHECK-NEXT: lgr %r4, %r13
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; CHECK-NEXT: lgr %r5, %r12
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; CHECK-NEXT: jl .LBB0_1
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; CHECK-NEXT:# %bb.2: # %atomicrmw.end
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; CHECK-NEXT: stg %r5, 0(%r2)
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; CHECK-NEXT: stg %r4, 8(%r2)
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; CHECK-NEXT: lmg %r12, %r15, 96(%r15)
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; CHECK-NEXT: br %r14
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%val = load fp128, ptr %b, align 16
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%res = atomicrmw xchg ptr %src, fp128 %val seq_cst
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store fp128 %res, ptr %ret, align 16
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ret void
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}
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