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AArch64: correctly fast-isel i8 & i16 multiplies

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We were asking for a register for type i8 or i16 which caused an assert.

rdar://problem/17620015

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212718 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Tim Northover 2014-07-10 14:18:46 +00:00
parent 24a071b8c5
commit 6b0ac2aa02
2 changed files with 41 additions and 0 deletions
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1
lib/Target/AArch64/AArch64FastISel.cpp
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@ -1907,6 +1907,7 @@ bool AArch64FastISel::SelectMul(const Instruction *I) {
case MVT::i32:
ZReg = AArch64::WZR;
Opc = AArch64::MADDWrrr;
SrcVT = MVT::i32;
break;
case MVT::i64:
ZReg = AArch64::XZR;

40
test/CodeGen/AArch64/fast-isel-mul.ll Normal file
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@ -0,0 +1,40 @@
; RUN: llc -fast-isel -fast-isel-abort -mtriple=aarch64 -o - %s | FileCheck %s
@var8 = global i8 0
@var16 = global i16 0
@var32 = global i32 0
@var64 = global i64 0
define void @test_mul8(i8 %lhs, i8 %rhs) {
; CHECK-LABEL: test_mul8:
; CHECK: mul w0, w0, w1
; %lhs = load i8* @var8
; %rhs = load i8* @var8
%prod = mul i8 %lhs, %rhs
store i8 %prod, i8* @var8
ret void
}
define void @test_mul16(i16 %lhs, i16 %rhs) {
; CHECK-LABEL: test_mul16:
; CHECK: mul w0, w0, w1
%prod = mul i16 %lhs, %rhs
store i16 %prod, i16* @var16
ret void
}
define void @test_mul32(i32 %lhs, i32 %rhs) {
; CHECK-LABEL: test_mul32:
; CHECK: mul w0, w0, w1
%prod = mul i32 %lhs, %rhs
store i32 %prod, i32* @var32
ret void
}
define void @test_mul64(i64 %lhs, i64 %rhs) {
; CHECK-LABEL: test_mul64:
; CHECK: mul x0, x0, x1
%prod = mul i64 %lhs, %rhs
store i64 %prod, i64* @var64
ret void
}