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71 lines
2.1 KiB
LLVM
71 lines
2.1 KiB
LLVM
; RUN: llc < %s -march=arm | FileCheck %s
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; RUN: llc < %s -mtriple=armv7 | FileCheck %s --check-prefix=CHECK-V7
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; Check generated signed and unsigned multiply accumulate long.
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define i64 @MACLongTest1(i32 %a, i32 %b, i64 %c) {
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;CHECK-LABEL: MACLongTest1:
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;CHECK: umlal
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%conv = zext i32 %a to i64
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%conv1 = zext i32 %b to i64
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%mul = mul i64 %conv1, %conv
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%add = add i64 %mul, %c
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ret i64 %add
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}
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define i64 @MACLongTest2(i32 %a, i32 %b, i64 %c) {
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;CHECK-LABEL: MACLongTest2:
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;CHECK: smlal
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%conv = sext i32 %a to i64
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%conv1 = sext i32 %b to i64
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%mul = mul nsw i64 %conv1, %conv
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%add = add nsw i64 %mul, %c
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ret i64 %add
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}
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define i64 @MACLongTest3(i32 %a, i32 %b, i32 %c) {
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;CHECK-LABEL: MACLongTest3:
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;CHECK: umlal
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%conv = zext i32 %b to i64
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%conv1 = zext i32 %a to i64
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%mul = mul i64 %conv, %conv1
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%conv2 = zext i32 %c to i64
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%add = add i64 %mul, %conv2
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ret i64 %add
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}
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define i64 @MACLongTest4(i32 %a, i32 %b, i32 %c) {
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;CHECK-LABEL: MACLongTest4:
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;CHECK: smlal
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%conv = sext i32 %b to i64
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%conv1 = sext i32 %a to i64
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%mul = mul nsw i64 %conv, %conv1
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%conv2 = sext i32 %c to i64
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%add = add nsw i64 %mul, %conv2
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ret i64 %add
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}
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; Two things to check here: the @earlyclobber constraint (on <= v5) and the "$Rd = $R" ones.
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; + Without @earlyclobber the v7 code is natural. With it, the first two
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; registers must be distinct from the third.
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; + Without "$Rd = $R", this can be satisfied without a mov before the umlal
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; by trying to use 6 different registers in the MachineInstr. The natural
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; evolution of this attempt currently leaves only two movs in the final
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; function, both after the umlal. With it, *some* move has to happen
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; before the umlal.
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define i64 @MACLongTest5(i64 %c, i32 %a, i32 %b) {
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; CHECK-V7-LABEL: MACLongTest5:
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; CHECK-V7-LABEL: umlal r0, r1, r0, r0
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; CHECK-LABEL: MACLongTest5:
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; CHECK: mov [[RDLO:r[0-9]+]], r0
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; CHECK: umlal [[RDLO]], r1, r0, r0
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; CHECK: mov r0, [[RDLO]]
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%conv.trunc = trunc i64 %c to i32
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%conv = zext i32 %conv.trunc to i64
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%conv1 = zext i32 %b to i64
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%mul = mul i64 %conv, %conv
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%add = add i64 %mul, %c
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ret i64 %add
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}
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