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f37b0dbf16
We were incorrectly sign extending into the high word (as you would for SMULO) when legalizing UMULO in terms of a wider full multiplication. Patch by James Duley. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@305800 91177308-0d34-0410-b5e6-96231b3b80d8
17 lines
496 B
LLVM
17 lines
496 B
LLVM
; RUN: llc < %s -mtriple=thumbv6m-none-eabi | FileCheck %s
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define i1 @unsigned_multiplication_did_overflow(i32, i32) {
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; CHECK-LABEL: unsigned_multiplication_did_overflow:
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entry-block:
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%2 = tail call { i32, i1 } @llvm.umul.with.overflow.i32(i32 %0, i32 %1)
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%3 = extractvalue { i32, i1 } %2, 1
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ret i1 %3
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; CHECK: mov{{s?}} r2, r1
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; CHECK: mov{{s?}} r1, #0
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; CHECK: mov{{s?}} r3, {{#0|r1}}
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; CHECK: bl __aeabi_lmul
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}
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declare { i32, i1 } @llvm.umul.with.overflow.i32(i32, i32)
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