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7466678003
1. Inform users of ADDEs with two 0 operands that it never sets carry 2. Fold other ADDs or ADDCs into the ADDE if possible It would be neat if we could do the same thing for SETCC+ADD eventually, but we can't do that in target independent code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126557 91177308-0d34-0410-b5e6-96231b3b80d8
27 lines
639 B
LLVM
27 lines
639 B
LLVM
; RUN: llc -march=x86-64 < %s | FileCheck %s -check-prefix=CHECK-64
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; RUN: llc -march=x86 < %s | FileCheck %s -check-prefix=CHECK-32
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define void @a(i64* nocapture %s, i64* nocapture %t, i64 %a, i64 %b, i64 %c) nounwind {
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entry:
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%0 = zext i64 %a to i128
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%1 = zext i64 %b to i128
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%2 = add i128 %1, %0
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%3 = zext i64 %c to i128
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%4 = shl i128 %3, 64
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%5 = add i128 %4, %2
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%6 = lshr i128 %5, 64
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%7 = trunc i128 %6 to i64
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store i64 %7, i64* %s, align 8
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%8 = trunc i128 %2 to i64
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store i64 %8, i64* %t, align 8
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ret void
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; CHECK-32: addl
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; CHECK-32: adcl
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; CHECK-32: adcl $0
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; CHECK-32: adcl $0
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; CHECK-64: addq
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; CHECK-64: adcq $0
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}
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