[PowerPC][NFC] Add a mulld testcase for scheduling check.

This patch add a mulld testcase for scheduling check.

Patch By: jsji (Jinsong Ji)
Differential Revision: https://reviews.llvm.org/D52039

llvm-svn: 342440

llvm/test/CodeGen/PowerPC/mulld.ll

@@ -0,0 +1,53 @@
+; RUN: llc -verify-machineinstrs -mcpu=pwr9 -mtriple=powerpc64-unknown-linux-gnu < %s | FileCheck %s 
+; RUN: llc -verify-machineinstrs -mcpu=pwr9 -mtriple=powerpc64le-unknown-linux-gnu < %s | FileCheck %s 
+; RUN: llc -verify-machineinstrs -mcpu=pwr8 -mtriple=powerpc64-unknown-linux-gnu < %s | FileCheck %s \
+; RUN: --check-prefix=CHECK-ITIN
+; RUN: llc -verify-machineinstrs -mcpu=pwr8 -mtriple=powerpc64le-unknown-linux-gnu < %s | FileCheck %s \ 
+; RUN: --check-prefix=CHECK-ITIN
+; RUN: llc -verify-machineinstrs -mcpu=pwr7 -mtriple=powerpc64-unknown-linux-gnu < %s | FileCheck %s \
+; RUN: --check-prefix=CHECK-ITIN
+
+define void @bn_mul_comba8(i64* nocapture %r, i64* nocapture readonly %a, i64* nocapture readonly %b) {
+; CHECK-LABEL: bn_mul_comba8:
+; CHECK:    mulhdu
+; CHECK-NEXT:    mulld
+; CHECK-NEXT:    mulhdu
+; CHECK-NEXT:    mulld
+; CHECK-NEXT:    mulhdu
+
+
+; CHECK-ITIN-LABEL: bn_mul_comba8:
+; CHECK-ITIN:    mulhdu
+; CHECK-ITIN-NEXT:    mulhdu
+; CHECK-ITIN-NEXT:    mulld
+; CHECK-ITIN-NEXT:    mulhdu
+; CHECK-ITIN-NEXT:    mulld
+
+  %1 = load i64, i64* %a, align 8
+  %conv = zext i64 %1 to i128
+  %2 = load i64, i64* %b, align 8
+  %conv2 = zext i64 %2 to i128
+  %mul = mul nuw i128 %conv2, %conv
+  %shr = lshr i128 %mul, 64
+  %agep = getelementptr inbounds i64, i64* %a, i64 1
+  %3 = load i64, i64* %agep, align 8
+  %conv14 = zext i64 %3 to i128
+  %mul15 = mul nuw i128 %conv14, %conv
+  %add17 = add i128 %mul15, %shr
+  %shr19 = lshr i128 %add17, 64
+  %conv20 = trunc i128 %shr19 to i64
+  %bgep = getelementptr inbounds i64, i64* %b, i64 1
+  %4 = load i64, i64* %bgep, align 8
+  %conv28 = zext i64 %4 to i128
+  %mul31 = mul nuw i128 %conv28, %conv2
+  %conv32 = and i128 %add17, 18446744073709551615
+  %add33 = add i128 %conv32, %mul31
+  %shr35 = lshr i128 %add33, 64
+  %conv36 = trunc i128 %shr35 to i64
+  %add37 = add i64 %conv36, %conv20
+  %cmp38 = icmp ult i64 %add37, %conv36
+  %conv148 = zext i1 %cmp38 to i64
+  store i64 %conv148, i64* %r, align 8
+  ret void
+}
+