e0919b189b
RegAllocGreedy uses SlotIndexes::getApproxInstrDistance to approximate the length of a live range for its heuristics. Renumbering all slot indexes with the default instruction distance ensures that this estimate will be as accurate as possible, and will not depend on the history of how instructions have been added to and removed from SlotIndexes's maps. This also means that enabling -early-live-intervals, which runs the SlotIndexes analysis earlier, will not cause large amounts of churn due to different register allocator decisions.
72 lines
2.2 KiB
LLVM
72 lines
2.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=i686-unknown-unknown -mattr=+avx | FileCheck %s --check-prefix=X32
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; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx | FileCheck %s --check-prefix=X64
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define i128 @mulhioverflow(i64 %a, i64 %b, i64 %c) nounwind {
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; X32-LABEL: mulhioverflow:
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; X32: # %bb.0:
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; X32-NEXT: pushl %ebp
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; X32-NEXT: pushl %ebx
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; X32-NEXT: pushl %edi
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; X32-NEXT: pushl %esi
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; X32-NEXT: movl {{[0-9]+}}(%esp), %esi
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; X32-NEXT: movl {{[0-9]+}}(%esp), %ebx
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; X32-NEXT: movl {{[0-9]+}}(%esp), %edi
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; X32-NEXT: movl {{[0-9]+}}(%esp), %ecx
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; X32-NEXT: movl %esi, %eax
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; X32-NEXT: mull %edi
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; X32-NEXT: movl %edx, %ebp
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; X32-NEXT: movl %ebx, %eax
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; X32-NEXT: mull %edi
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; X32-NEXT: movl %edx, %edi
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; X32-NEXT: movl %eax, %ebx
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; X32-NEXT: addl %ebp, %ebx
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; X32-NEXT: adcl $0, %edi
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; X32-NEXT: movl %esi, %eax
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; X32-NEXT: mull %ecx
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; X32-NEXT: movl %edx, %esi
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; X32-NEXT: addl %ebx, %eax
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; X32-NEXT: adcl %edi, %esi
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; X32-NEXT: setb %bl
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; X32-NEXT: movl {{[0-9]+}}(%esp), %eax
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; X32-NEXT: mull %ecx
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; X32-NEXT: addl %esi, %eax
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; X32-NEXT: movzbl %bl, %ecx
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; X32-NEXT: adcl %ecx, %edx
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; X32-NEXT: movl {{[0-9]+}}(%esp), %ecx
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; X32-NEXT: andl $1, %ecx
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; X32-NEXT: addl %eax, %ecx
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; X32-NEXT: movl {{[0-9]+}}(%esp), %eax
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; X32-NEXT: movl %ecx, (%eax)
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; X32-NEXT: adcl $0, %edx
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; X32-NEXT: movl %edx, 4(%eax)
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; X32-NEXT: setb %cl
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; X32-NEXT: movzbl %cl, %ecx
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; X32-NEXT: movl %ecx, 8(%eax)
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; X32-NEXT: movl $0, 12(%eax)
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; X32-NEXT: popl %esi
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; X32-NEXT: popl %edi
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; X32-NEXT: popl %ebx
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; X32-NEXT: popl %ebp
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; X32-NEXT: retl $4
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;
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; X64-LABEL: mulhioverflow:
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; X64: # %bb.0:
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; X64-NEXT: movq %rdx, %rcx
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; X64-NEXT: movq %rdi, %rax
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; X64-NEXT: mulq %rsi
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; X64-NEXT: andl $1, %ecx
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; X64-NEXT: addq %rdx, %rcx
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; X64-NEXT: movq %rcx, %rax
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; X64-NEXT: xorl %edx, %edx
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; X64-NEXT: retq
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%1 = zext i64 %a to i128
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%2 = zext i64 %b to i128
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%3 = mul i128 %1, %2
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%4 = lshr i128 %3, 64
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%5 = and i64 %c, 1
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%6 = zext i64 %5 to i128
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%7 = add i128 %4, %6
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ret i128 %7
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}
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