[SystemZ] Fold more spills

[oota-llvm.git] / test / CodeGen / SystemZ / int-mul-08.ll

diff --git a/test/CodeGen/SystemZ/int-mul-08.ll b/test/CodeGen/SystemZ/int-mul-08.ll
index 09ebe7a7b489ad01b02e88e01759fec97e1467fc..e06cfc2cc2058795af243eb1e507c56ccc5b006e 100644 (file)
--- a/test/CodeGen/SystemZ/int-mul-08.ll
+++ b/test/CodeGen/SystemZ/int-mul-08.ll
@@ -2,6 +2,8 @@
 ;
 ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
 
+declare i64 @foo()
+
 ; Check zero-extended multiplication in which only the high part is used.
 define i64 @f1(i64 %dummy, i64 %a, i64 %b) {
 ; CHECK: f1:
@@ -186,3 +188,77 @@ define i64 @f12(i64 *%dest, i64 %a, i64 %src, i64 %index) {
   %high = trunc i128 %highx to i64
   ret i64 %high
 }
+
+; Check that multiplications of spilled values can use MLG rather than MLGR.
+define i64 @f13(i64 *%ptr0) {
+; CHECK: f13:
+; CHECK: brasl %r14, foo@PLT
+; CHECK: mlg {{%r[0-9]+}}, 160(%r15)
+; CHECK: br %r14
+  %ptr1 = getelementptr i64 *%ptr0, i64 2
+  %ptr2 = getelementptr i64 *%ptr0, i64 4
+  %ptr3 = getelementptr i64 *%ptr0, i64 6
+  %ptr4 = getelementptr i64 *%ptr0, i64 8
+  %ptr5 = getelementptr i64 *%ptr0, i64 10
+  %ptr6 = getelementptr i64 *%ptr0, i64 12
+  %ptr7 = getelementptr i64 *%ptr0, i64 14
+  %ptr8 = getelementptr i64 *%ptr0, i64 16
+  %ptr9 = getelementptr i64 *%ptr0, i64 18
+
+  %val0 = load i64 *%ptr0
+  %val1 = load i64 *%ptr1
+  %val2 = load i64 *%ptr2
+  %val3 = load i64 *%ptr3
+  %val4 = load i64 *%ptr4
+  %val5 = load i64 *%ptr5
+  %val6 = load i64 *%ptr6
+  %val7 = load i64 *%ptr7
+  %val8 = load i64 *%ptr8
+  %val9 = load i64 *%ptr9
+
+  %ret = call i64 @foo()
+
+  %retx = zext i64 %ret to i128
+  %val0x = zext i64 %val0 to i128
+  %mul0d = mul i128 %retx, %val0x
+  %mul0x = lshr i128 %mul0d, 64
+
+  %val1x = zext i64 %val1 to i128
+  %mul1d = mul i128 %mul0x, %val1x
+  %mul1x = lshr i128 %mul1d, 64
+
+  %val2x = zext i64 %val2 to i128
+  %mul2d = mul i128 %mul1x, %val2x
+  %mul2x = lshr i128 %mul2d, 64
+
+  %val3x = zext i64 %val3 to i128
+  %mul3d = mul i128 %mul2x, %val3x
+  %mul3x = lshr i128 %mul3d, 64
+
+  %val4x = zext i64 %val4 to i128
+  %mul4d = mul i128 %mul3x, %val4x
+  %mul4x = lshr i128 %mul4d, 64
+
+  %val5x = zext i64 %val5 to i128
+  %mul5d = mul i128 %mul4x, %val5x
+  %mul5x = lshr i128 %mul5d, 64
+
+  %val6x = zext i64 %val6 to i128
+  %mul6d = mul i128 %mul5x, %val6x
+  %mul6x = lshr i128 %mul6d, 64
+
+  %val7x = zext i64 %val7 to i128
+  %mul7d = mul i128 %mul6x, %val7x
+  %mul7x = lshr i128 %mul7d, 64
+
+  %val8x = zext i64 %val8 to i128
+  %mul8d = mul i128 %mul7x, %val8x
+  %mul8x = lshr i128 %mul8d, 64
+
+  %val9x = zext i64 %val9 to i128
+  %mul9d = mul i128 %mul8x, %val9x
+  %mul9x = lshr i128 %mul9d, 64
+
+  %mul9 = trunc i128 %mul9x to i64
+  ret i64 %mul9
+}