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209 lines
5.3 KiB
LLVM
209 lines
5.3 KiB
LLVM
; Test 64-bit signed division and remainder when the divisor is
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; a signed-extended i32.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu -asm-verbose=0 | FileCheck %s
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declare i64 @foo()
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; Test register division. The result is in the second of the two registers.
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define void @f1(i64 %dummy, i64 %a, i32 %b, i64 *%dest) {
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; CHECK-LABEL: f1:
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; CHECK-NOT: {{%r[234]}}
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; CHECK: dsgfr %r2, %r4
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; CHECK: stg %r3, 0(%r5)
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; CHECK: br %r14
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%bext = sext i32 %b to i64
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%div = sdiv i64 %a, %bext
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store i64 %div, i64 *%dest
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ret void
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}
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; Test register remainder. The result is in the first of the two registers.
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define void @f2(i64 %dummy, i64 %a, i32 %b, i64 *%dest) {
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; CHECK-LABEL: f2:
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; CHECK-NOT: {{%r[234]}}
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; CHECK: dsgfr %r2, %r4
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; CHECK: stg %r2, 0(%r5)
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; CHECK: br %r14
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%bext = sext i32 %b to i64
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%rem = srem i64 %a, %bext
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store i64 %rem, i64 *%dest
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ret void
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}
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; Test that division and remainder use a single instruction.
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define i64 @f3(i64 %dummy, i64 %a, i32 %b) {
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; CHECK-LABEL: f3:
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; CHECK-NOT: {{%r[234]}}
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; CHECK: dsgfr %r2, %r4
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; CHECK: ogr %r2, %r3
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; CHECK: br %r14
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%bext = sext i32 %b to i64
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%div = sdiv i64 %a, %bext
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%rem = srem i64 %a, %bext
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%or = or i64 %rem, %div
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ret i64 %or
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}
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; Test register division when the dividend is zero rather than sign extended.
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; We can't use dsgfr here
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define void @f4(i64 %dummy, i64 %a, i32 %b, i64 *%dest) {
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; CHECK-LABEL: f4:
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; CHECK-NOT: dsgfr
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; CHECK: br %r14
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%bext = zext i32 %b to i64
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%div = sdiv i64 %a, %bext
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store i64 %div, i64 *%dest
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ret void
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}
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; ...likewise remainder.
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define void @f5(i64 %dummy, i64 %a, i32 %b, i64 *%dest) {
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; CHECK-LABEL: f5:
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; CHECK-NOT: dsgfr
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; CHECK: br %r14
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%bext = zext i32 %b to i64
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%rem = srem i64 %a, %bext
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store i64 %rem, i64 *%dest
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ret void
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}
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; Test memory division with no displacement.
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define void @f6(i64 %dummy, i64 %a, i32 *%src, i64 *%dest) {
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; CHECK-LABEL: f6:
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; CHECK-NOT: {{%r[234]}}
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; CHECK: dsgf %r2, 0(%r4)
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; CHECK: stg %r3, 0(%r5)
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; CHECK: br %r14
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%b = load i32, i32 *%src
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%bext = sext i32 %b to i64
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%div = sdiv i64 %a, %bext
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store i64 %div, i64 *%dest
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ret void
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}
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; Test memory remainder with no displacement.
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define void @f7(i64 %dummy, i64 %a, i32 *%src, i64 *%dest) {
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; CHECK-LABEL: f7:
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; CHECK-NOT: {{%r[234]}}
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; CHECK: dsgf %r2, 0(%r4)
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; CHECK: stg %r2, 0(%r5)
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; CHECK: br %r14
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%b = load i32, i32 *%src
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%bext = sext i32 %b to i64
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%rem = srem i64 %a, %bext
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store i64 %rem, i64 *%dest
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ret void
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}
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; Test both memory division and memory remainder.
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define i64 @f8(i64 %dummy, i64 %a, i32 *%src) {
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; CHECK-LABEL: f8:
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; CHECK-NOT: {{%r[234]}}
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; CHECK: dsgf %r2, 0(%r4)
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; CHECK-NOT: {{dsgf|dsgfr}}
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; CHECK: ogr %r2, %r3
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; CHECK: br %r14
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%b = load i32, i32 *%src
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%bext = sext i32 %b to i64
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%div = sdiv i64 %a, %bext
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%rem = srem i64 %a, %bext
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%or = or i64 %rem, %div
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ret i64 %or
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}
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; Check the high end of the DSGF range.
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define i64 @f9(i64 %dummy, i64 %a, i32 *%src) {
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; CHECK-LABEL: f9:
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; CHECK: dsgf %r2, 524284(%r4)
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; CHECK: br %r14
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%ptr = getelementptr i32, i32 *%src, i64 131071
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%b = load i32, i32 *%ptr
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%bext = sext i32 %b to i64
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%rem = srem i64 %a, %bext
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ret i64 %rem
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}
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; Check the next word up, which needs separate address logic.
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; Other sequences besides this one would be OK.
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define i64 @f10(i64 %dummy, i64 %a, i32 *%src) {
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; CHECK-LABEL: f10:
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; CHECK: agfi %r4, 524288
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; CHECK: dsgf %r2, 0(%r4)
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; CHECK: br %r14
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%ptr = getelementptr i32, i32 *%src, i64 131072
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%b = load i32, i32 *%ptr
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%bext = sext i32 %b to i64
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%rem = srem i64 %a, %bext
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ret i64 %rem
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}
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; Check the high end of the negative aligned DSGF range.
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define i64 @f11(i64 %dummy, i64 %a, i32 *%src) {
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; CHECK-LABEL: f11:
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; CHECK: dsgf %r2, -4(%r4)
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; CHECK: br %r14
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%ptr = getelementptr i32, i32 *%src, i64 -1
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%b = load i32, i32 *%ptr
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%bext = sext i32 %b to i64
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%rem = srem i64 %a, %bext
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ret i64 %rem
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}
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; Check the low end of the DSGF range.
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define i64 @f12(i64 %dummy, i64 %a, i32 *%src) {
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; CHECK-LABEL: f12:
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; CHECK: dsgf %r2, -524288(%r4)
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; CHECK: br %r14
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%ptr = getelementptr i32, i32 *%src, i64 -131072
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%b = load i32, i32 *%ptr
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%bext = sext i32 %b to i64
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%rem = srem i64 %a, %bext
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ret i64 %rem
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}
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; Check the next word down, which needs separate address logic.
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; Other sequences besides this one would be OK.
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define i64 @f13(i64 %dummy, i64 %a, i32 *%src) {
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; CHECK-LABEL: f13:
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; CHECK: agfi %r4, -524292
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; CHECK: dsgf %r2, 0(%r4)
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; CHECK: br %r14
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%ptr = getelementptr i32, i32 *%src, i64 -131073
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%b = load i32, i32 *%ptr
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%bext = sext i32 %b to i64
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%rem = srem i64 %a, %bext
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ret i64 %rem
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}
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; Check that DSGF allows an index.
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define i64 @f14(i64 %dummy, i64 %a, i64 %src, i64 %index) {
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; CHECK-LABEL: f14:
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; CHECK: dsgf %r2, 524287(%r5,%r4)
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; CHECK: br %r14
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%add1 = add i64 %src, %index
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%add2 = add i64 %add1, 524287
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%ptr = inttoptr i64 %add2 to i32 *
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%b = load i32, i32 *%ptr
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%bext = sext i32 %b to i64
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%rem = srem i64 %a, %bext
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ret i64 %rem
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}
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; Make sure that we still use DSGFR rather than DSGR in cases where
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; a load and division cannot be combined.
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define void @f15(i64 *%dest, i32 *%src) {
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; CHECK-LABEL: f15:
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; CHECK: l [[B:%r[0-9]+]], 0(%r3)
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; CHECK: brasl %r14, foo@PLT
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; CHECK: lgr %r1, %r2
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; CHECK: dsgfr %r0, [[B]]
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; CHECK: br %r14
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%b = load i32, i32 *%src
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%a = call i64 @foo()
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%ext = sext i32 %b to i64
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%div = sdiv i64 %a, %ext
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store i64 %div, i64 *%dest
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ret void
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}
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