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Add regression test for efficient codegen of i32 x i32 -> hi32(i64) as

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mulhs.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23183 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nate Begeman 2005-09-01 00:04:03 +00:00
parent 67d2562be7
commit feca19b0d4
1 changed files with 17 additions and 0 deletions
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test/CodeGen/PowerPC/mulhs.ll Normal file
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; All of these ands and shifts should be folded into rlwimi's
; RUN: llvm-as < mulhs.ll | llc -march=ppc32 | not grep mulhwu &&
; RUN: llvm-as < mulhs.ll | llc -march=ppc32 | not grep srawi &&
; RUN: llvm-as < mulhs.ll | llc -march=ppc32 | not grep add &&
; RUN: llvm-as < mulhs.ll | llc -march=ppc32 | grep mulhw | wc -l | grep 1
implementation ; Functions:
int %mulhs(int %a, int %b) {
entry:
%tmp.1 = cast int %a to ulong ; <ulong> [#uses=1]
%tmp.3 = cast int %b to ulong ; <ulong> [#uses=1]
%tmp.4 = mul ulong %tmp.3, %tmp.1 ; <ulong> [#uses=1]
%tmp.6 = shr ulong %tmp.4, ubyte 32 ; <ulong> [#uses=1]
%tmp.7 = cast ulong %tmp.6 to int ; <int> [#uses=1]
ret int %tmp.7
}