;
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
+declare double @foo()
+
; Check register subtraction.
define double @f1(double %f1, double %f2) {
-; CHECK: f1:
+; CHECK-LABEL: f1:
; CHECK: sdbr %f0, %f2
; CHECK: br %r14
%res = fsub double %f1, %f2
; Check the low end of the SDB range.
define double @f2(double %f1, double *%ptr) {
-; CHECK: f2:
+; CHECK-LABEL: f2:
; CHECK: sdb %f0, 0(%r2)
; CHECK: br %r14
%f2 = load double *%ptr
; Check the high end of the aligned SDB range.
define double @f3(double %f1, double *%base) {
-; CHECK: f3:
+; CHECK-LABEL: f3:
; CHECK: sdb %f0, 4088(%r2)
; CHECK: br %r14
%ptr = getelementptr double *%base, i64 511
; Check the next doubleword up, which needs separate address logic.
; Other sequences besides this one would be OK.
define double @f4(double %f1, double *%base) {
-; CHECK: f4:
+; CHECK-LABEL: f4:
; CHECK: aghi %r2, 4096
; CHECK: sdb %f0, 0(%r2)
; CHECK: br %r14
; Check negative displacements, which also need separate address logic.
define double @f5(double %f1, double *%base) {
-; CHECK: f5:
+; CHECK-LABEL: f5:
; CHECK: aghi %r2, -8
; CHECK: sdb %f0, 0(%r2)
; CHECK: br %r14
; Check that SDB allows indices.
define double @f6(double %f1, double *%base, i64 %index) {
-; CHECK: f6:
+; CHECK-LABEL: f6:
; CHECK: sllg %r1, %r3, 3
; CHECK: sdb %f0, 800(%r1,%r2)
; CHECK: br %r14
%res = fsub double %f1, %f2
ret double %res
}
+
+; Check that subtractions of spilled values can use SDB rather than SDBR.
+define double @f7(double *%ptr0) {
+; CHECK-LABEL: f7:
+; CHECK: brasl %r14, foo@PLT
+; CHECK: sdb %f0, 16{{[04]}}(%r15)
+; CHECK: br %r14
+ %ptr1 = getelementptr double *%ptr0, i64 2
+ %ptr2 = getelementptr double *%ptr0, i64 4
+ %ptr3 = getelementptr double *%ptr0, i64 6
+ %ptr4 = getelementptr double *%ptr0, i64 8
+ %ptr5 = getelementptr double *%ptr0, i64 10
+ %ptr6 = getelementptr double *%ptr0, i64 12
+ %ptr7 = getelementptr double *%ptr0, i64 14
+ %ptr8 = getelementptr double *%ptr0, i64 16
+ %ptr9 = getelementptr double *%ptr0, i64 18
+ %ptr10 = getelementptr double *%ptr0, i64 20
+
+ %val0 = load double *%ptr0
+ %val1 = load double *%ptr1
+ %val2 = load double *%ptr2
+ %val3 = load double *%ptr3
+ %val4 = load double *%ptr4
+ %val5 = load double *%ptr5
+ %val6 = load double *%ptr6
+ %val7 = load double *%ptr7
+ %val8 = load double *%ptr8
+ %val9 = load double *%ptr9
+ %val10 = load double *%ptr10
+
+ %ret = call double @foo()
+
+ %sub0 = fsub double %ret, %val0
+ %sub1 = fsub double %sub0, %val1
+ %sub2 = fsub double %sub1, %val2
+ %sub3 = fsub double %sub2, %val3
+ %sub4 = fsub double %sub3, %val4
+ %sub5 = fsub double %sub4, %val5
+ %sub6 = fsub double %sub5, %val6
+ %sub7 = fsub double %sub6, %val7
+ %sub8 = fsub double %sub7, %val8
+ %sub9 = fsub double %sub8, %val9
+ %sub10 = fsub double %sub9, %val10
+
+ ret double %sub10
+}