;
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
+declare i32 @foo()
+
; Test register division. The result is in the second of the two registers.
define void @f1(i32 *%dest, i32 %a, i32 %b) {
-; CHECK: f1:
+; CHECK-LABEL: f1:
; CHECK: lgfr %r1, %r3
; CHECK: dsgfr %r0, %r4
; CHECK: st %r1, 0(%r2)
; Test register remainder. The result is in the first of the two registers.
define void @f2(i32 *%dest, i32 %a, i32 %b) {
-; CHECK: f2:
+; CHECK-LABEL: f2:
; CHECK: lgfr %r1, %r3
; CHECK: dsgfr %r0, %r4
; CHECK: st %r0, 0(%r2)
; Test that division and remainder use a single instruction.
define i32 @f3(i32 %dummy, i32 %a, i32 %b) {
-; CHECK: f3:
+; CHECK-LABEL: f3:
; CHECK-NOT: %r2
; CHECK: lgfr %r3, %r3
; CHECK-NOT: %r2
; Check that the sign extension of the dividend is elided when the argument
; is already sign-extended.
define i32 @f4(i32 %dummy, i32 signext %a, i32 %b) {
-; CHECK: f4:
+; CHECK-LABEL: f4:
; CHECK-NOT: {{%r[234]}}
; CHECK: dsgfr %r2, %r4
; CHECK-NOT: dsgfr
; Test that memory dividends are loaded using sign extension (LGF).
define i32 @f5(i32 %dummy, i32 *%src, i32 %b) {
-; CHECK: f5:
+; CHECK-LABEL: f5:
; CHECK-NOT: %r2
; CHECK: lgf %r3, 0(%r3)
; CHECK-NOT: %r2
; Test memory division with no displacement.
define void @f6(i32 *%dest, i32 %a, i32 *%src) {
-; CHECK: f6:
+; CHECK-LABEL: f6:
; CHECK: lgfr %r1, %r3
; CHECK: dsgf %r0, 0(%r4)
; CHECK: st %r1, 0(%r2)
; Test memory remainder with no displacement.
define void @f7(i32 *%dest, i32 %a, i32 *%src) {
-; CHECK: f7:
+; CHECK-LABEL: f7:
; CHECK: lgfr %r1, %r3
; CHECK: dsgf %r0, 0(%r4)
; CHECK: st %r0, 0(%r2)
; Test both memory division and memory remainder.
define i32 @f8(i32 %dummy, i32 %a, i32 *%src) {
-; CHECK: f8:
+; CHECK-LABEL: f8:
; CHECK-NOT: %r2
; CHECK: lgfr %r3, %r3
; CHECK-NOT: %r2
; Check the high end of the DSGF range.
define i32 @f9(i32 %dummy, i32 %a, i32 *%src) {
-; CHECK: f9:
+; CHECK-LABEL: f9:
; CHECK: dsgf %r2, 524284(%r4)
; CHECK: br %r14
%ptr = getelementptr i32 *%src, i64 131071
; Check the next word up, which needs separate address logic.
; Other sequences besides this one would be OK.
define i32 @f10(i32 %dummy, i32 %a, i32 *%src) {
-; CHECK: f10:
+; CHECK-LABEL: f10:
; CHECK: agfi %r4, 524288
; CHECK: dsgf %r2, 0(%r4)
; CHECK: br %r14
; Check the high end of the negative aligned DSGF range.
define i32 @f11(i32 %dummy, i32 %a, i32 *%src) {
-; CHECK: f11:
+; CHECK-LABEL: f11:
; CHECK: dsgf %r2, -4(%r4)
; CHECK: br %r14
%ptr = getelementptr i32 *%src, i64 -1
; Check the low end of the DSGF range.
define i32 @f12(i32 %dummy, i32 %a, i32 *%src) {
-; CHECK: f12:
+; CHECK-LABEL: f12:
; CHECK: dsgf %r2, -524288(%r4)
; CHECK: br %r14
%ptr = getelementptr i32 *%src, i64 -131072
; Check the next word down, which needs separate address logic.
; Other sequences besides this one would be OK.
define i32 @f13(i32 %dummy, i32 %a, i32 *%src) {
-; CHECK: f13:
+; CHECK-LABEL: f13:
; CHECK: agfi %r4, -524292
; CHECK: dsgf %r2, 0(%r4)
; CHECK: br %r14
; Check that DSGF allows an index.
define i32 @f14(i32 %dummy, i32 %a, i64 %src, i64 %index) {
-; CHECK: f14:
+; CHECK-LABEL: f14:
; CHECK: dsgf %r2, 524287(%r5,%r4)
; CHECK: br %r14
%add1 = add i64 %src, %index
%rem = srem i32 %a, %b
ret i32 %rem
}
+
+; Make sure that we still use DSGFR rather than DSGR in cases where
+; a load and division cannot be combined.
+define void @f15(i32 *%dest, i32 *%src) {
+; CHECK-LABEL: f15:
+; CHECK: l [[B:%r[0-9]+]], 0(%r3)
+; CHECK: brasl %r14, foo@PLT
+; CHECK: lgfr %r1, %r2
+; CHECK: dsgfr %r0, [[B]]
+; CHECK: br %r14
+ %b = load i32 *%src
+ %a = call i32 @foo()
+ %div = sdiv i32 %a, %b
+ store i32 %div, i32 *%dest
+ ret void
+}
+
+; Check that divisions of spilled values can use DSGF rather than DSGFR.
+define i32 @f16(i32 *%ptr0) {
+; CHECK-LABEL: f16:
+; CHECK: brasl %r14, foo@PLT
+; CHECK: dsgf {{%r[0-9]+}}, 16{{[04]}}(%r15)
+; CHECK: br %r14
+ %ptr1 = getelementptr i32 *%ptr0, i64 2
+ %ptr2 = getelementptr i32 *%ptr0, i64 4
+ %ptr3 = getelementptr i32 *%ptr0, i64 6
+ %ptr4 = getelementptr i32 *%ptr0, i64 8
+ %ptr5 = getelementptr i32 *%ptr0, i64 10
+ %ptr6 = getelementptr i32 *%ptr0, i64 12
+ %ptr7 = getelementptr i32 *%ptr0, i64 14
+ %ptr8 = getelementptr i32 *%ptr0, i64 16
+ %ptr9 = getelementptr i32 *%ptr0, i64 18
+
+ %val0 = load i32 *%ptr0
+ %val1 = load i32 *%ptr1
+ %val2 = load i32 *%ptr2
+ %val3 = load i32 *%ptr3
+ %val4 = load i32 *%ptr4
+ %val5 = load i32 *%ptr5
+ %val6 = load i32 *%ptr6
+ %val7 = load i32 *%ptr7
+ %val8 = load i32 *%ptr8
+ %val9 = load i32 *%ptr9
+
+ %ret = call i32 @foo()
+
+ %div0 = sdiv i32 %ret, %val0
+ %div1 = sdiv i32 %div0, %val1
+ %div2 = sdiv i32 %div1, %val2
+ %div3 = sdiv i32 %div2, %val3
+ %div4 = sdiv i32 %div3, %val4
+ %div5 = sdiv i32 %div4, %val5
+ %div6 = sdiv i32 %div5, %val6
+ %div7 = sdiv i32 %div6, %val7
+ %div8 = sdiv i32 %div7, %val8
+ %div9 = sdiv i32 %div8, %val9
+
+ ret i32 %div9
+}