caio/clang-p2996
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
bbcebec3af5ac473f5d3557683f18a79a4b12ab5
clang-p2996/llvm/test/CodeGen/SystemZ/spill-01.ll
Kai Nacke a1710eb3cd [SystemZ][NFC] Opaque pointer migration. 
The LIT test cases were migrated with the script provided by
Nikita Popov.

No manual changes were made. Committed without review since
no functional changes, after consultation with uweigand.
2022-10-11 21:09:43 +00:00

549 lines
16 KiB
LLVM
Raw Blame History

; Test spilling using MVC. The tests here assume z10 register pressure,
; without the high words being available.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 -verify-machineinstrs | FileCheck %s
declare void @foo()
@g0 = dso_local global i32 0
@g1 = dso_local global i32 1
@g2 = dso_local global i32 2
@g3 = dso_local global i32 3
@g4 = dso_local global i32 4
@g5 = dso_local global i32 5
@g6 = dso_local global i32 6
@g7 = dso_local global i32 7
@g8 = dso_local global i32 8
@g9 = dso_local global i32 9
@h0 = dso_local global i64 0
@h1 = dso_local global i64 1
@h2 = dso_local global i64 2
@h3 = dso_local global i64 3
@h4 = dso_local global i64 4
@h5 = dso_local global i64 5
@h6 = dso_local global i64 6
@h7 = dso_local global i64 7
@h8 = dso_local global i64 8
@h9 = dso_local global i64 9
; This function shouldn't spill anything
define dso_local void @f1(ptr %ptr0) {
; CHECK-LABEL: f1:
; CHECK: stmg
; CHECK: aghi %r15, -160
; CHECK-NOT: %r15
; CHECK: brasl %r14, foo@PLT
; CHECK-NOT: %r15
; CHECK: lmg
; CHECK: br %r14
%ptr1 = getelementptr i32, ptr %ptr0, i32 2
%ptr2 = getelementptr i32, ptr %ptr0, i32 4
%ptr3 = getelementptr i32, ptr %ptr0, i32 6
%ptr4 = getelementptr i32, ptr %ptr0, i32 8
%ptr5 = getelementptr i32, ptr %ptr0, i32 10
%ptr6 = getelementptr i32, ptr %ptr0, i32 12
%val0 = load i32, ptr %ptr0
%val1 = load i32, ptr %ptr1
%val2 = load i32, ptr %ptr2
%val3 = load i32, ptr %ptr3
%val4 = load i32, ptr %ptr4
%val5 = load i32, ptr %ptr5
%val6 = load i32, ptr %ptr6
call void @foo()
store i32 %val0, ptr %ptr0
store i32 %val1, ptr %ptr1
store i32 %val2, ptr %ptr2
store i32 %val3, ptr %ptr3
store i32 %val4, ptr %ptr4
store i32 %val5, ptr %ptr5
store i32 %val6, ptr %ptr6
ret void
}
; Test a case where at least one i32 load and at least one i32 store
; need spills.
define dso_local void @f2(ptr %ptr0) {
; CHECK-LABEL: f2:
; CHECK: mvc [[OFFSET1:16[04]]](4,%r15), [[OFFSET2:[0-9]+]]({{%r[0-9]+}})
; CHECK: brasl %r14, foo@PLT
; CHECK: mvc [[OFFSET2]](4,{{%r[0-9]+}}), [[OFFSET1]](%r15)
; CHECK: br %r14
%ptr1 = getelementptr i32, ptr %ptr0, i64 2
%ptr2 = getelementptr i32, ptr %ptr0, i64 4
%ptr3 = getelementptr i32, ptr %ptr0, i64 6
%ptr4 = getelementptr i32, ptr %ptr0, i64 8
%ptr5 = getelementptr i32, ptr %ptr0, i64 10
%ptr6 = getelementptr i32, ptr %ptr0, i64 12
%ptr7 = getelementptr i32, ptr %ptr0, i64 14
%ptr8 = getelementptr i32, ptr %ptr0, i64 16
%val0 = load i32, ptr %ptr0
%val1 = load i32, ptr %ptr1
%val2 = load i32, ptr %ptr2
%val3 = load i32, ptr %ptr3
%val4 = load i32, ptr %ptr4
%val5 = load i32, ptr %ptr5
%val6 = load i32, ptr %ptr6
%val7 = load i32, ptr %ptr7
%val8 = load i32, ptr %ptr8
call void @foo()
store i32 %val0, ptr %ptr0
store i32 %val1, ptr %ptr1
store i32 %val2, ptr %ptr2
store i32 %val3, ptr %ptr3
store i32 %val4, ptr %ptr4
store i32 %val5, ptr %ptr5
store i32 %val6, ptr %ptr6
store i32 %val7, ptr %ptr7
store i32 %val8, ptr %ptr8
ret void
}
; Test a case where at least one i64 load and at least one i64 store
; need spills.
define dso_local void @f3(ptr %ptr0) {
; CHECK-LABEL: f3:
; CHECK: mvc 160(8,%r15), [[OFFSET:[0-9]+]]({{%r[0-9]+}})
; CHECK: brasl %r14, foo@PLT
; CHECK: mvc [[OFFSET]](8,{{%r[0-9]+}}), 160(%r15)
; CHECK: br %r14
%ptr1 = getelementptr i64, ptr %ptr0, i64 2
%ptr2 = getelementptr i64, ptr %ptr0, i64 4
%ptr3 = getelementptr i64, ptr %ptr0, i64 6
%ptr4 = getelementptr i64, ptr %ptr0, i64 8
%ptr5 = getelementptr i64, ptr %ptr0, i64 10
%ptr6 = getelementptr i64, ptr %ptr0, i64 12
%ptr7 = getelementptr i64, ptr %ptr0, i64 14
%ptr8 = getelementptr i64, ptr %ptr0, i64 16
%val0 = load i64, ptr %ptr0
%val1 = load i64, ptr %ptr1
%val2 = load i64, ptr %ptr2
%val3 = load i64, ptr %ptr3
%val4 = load i64, ptr %ptr4
%val5 = load i64, ptr %ptr5
%val6 = load i64, ptr %ptr6
%val7 = load i64, ptr %ptr7
%val8 = load i64, ptr %ptr8
call void @foo()
store i64 %val0, ptr %ptr0
store i64 %val1, ptr %ptr1
store i64 %val2, ptr %ptr2
store i64 %val3, ptr %ptr3
store i64 %val4, ptr %ptr4
store i64 %val5, ptr %ptr5
store i64 %val6, ptr %ptr6
store i64 %val7, ptr %ptr7
store i64 %val8, ptr %ptr8
ret void
}
; Test a case where at least at least one f32 load and at least one f32 store
; need spills. The 8 call-saved FPRs could be used for 8 of the %vals
; (and are at the time of writing), but it would really be better to use
; MVC for all 10.
define dso_local void @f4(ptr %ptr0) {
; CHECK-LABEL: f4:
; CHECK: mvc [[OFFSET1:16[04]]](4,%r15), [[OFFSET2:[0-9]+]]({{%r[0-9]+}})
; CHECK: brasl %r14, foo@PLT
; CHECK: mvc [[OFFSET2]](4,{{%r[0-9]+}}), [[OFFSET1]](%r15)
; CHECK: br %r14
%ptr1 = getelementptr float, ptr %ptr0, i64 2
%ptr2 = getelementptr float, ptr %ptr0, i64 4
%ptr3 = getelementptr float, ptr %ptr0, i64 6
%ptr4 = getelementptr float, ptr %ptr0, i64 8
%ptr5 = getelementptr float, ptr %ptr0, i64 10
%ptr6 = getelementptr float, ptr %ptr0, i64 12
%ptr7 = getelementptr float, ptr %ptr0, i64 14
%ptr8 = getelementptr float, ptr %ptr0, i64 16
%ptr9 = getelementptr float, ptr %ptr0, i64 18
%val0 = load float, ptr %ptr0
%val1 = load float, ptr %ptr1
%val2 = load float, ptr %ptr2
%val3 = load float, ptr %ptr3
%val4 = load float, ptr %ptr4
%val5 = load float, ptr %ptr5
%val6 = load float, ptr %ptr6
%val7 = load float, ptr %ptr7
%val8 = load float, ptr %ptr8
%val9 = load float, ptr %ptr9
call void @foo()
store float %val0, ptr %ptr0
store float %val1, ptr %ptr1
store float %val2, ptr %ptr2
store float %val3, ptr %ptr3
store float %val4, ptr %ptr4
store float %val5, ptr %ptr5
store float %val6, ptr %ptr6
store float %val7, ptr %ptr7
store float %val8, ptr %ptr8
store float %val9, ptr %ptr9
ret void
}
; Similarly for f64.
define dso_local void @f5(ptr %ptr0) {
; CHECK-LABEL: f5:
; CHECK: mvc 160(8,%r15), [[OFFSET:[0-9]+]]({{%r[0-9]+}})
; CHECK: brasl %r14, foo@PLT
; CHECK: mvc [[OFFSET]](8,{{%r[0-9]+}}), 160(%r15)
; CHECK: br %r14
%ptr1 = getelementptr double, ptr %ptr0, i64 2
%ptr2 = getelementptr double, ptr %ptr0, i64 4
%ptr3 = getelementptr double, ptr %ptr0, i64 6
%ptr4 = getelementptr double, ptr %ptr0, i64 8
%ptr5 = getelementptr double, ptr %ptr0, i64 10
%ptr6 = getelementptr double, ptr %ptr0, i64 12
%ptr7 = getelementptr double, ptr %ptr0, i64 14
%ptr8 = getelementptr double, ptr %ptr0, i64 16
%ptr9 = getelementptr double, ptr %ptr0, i64 18
%val0 = load double, ptr %ptr0
%val1 = load double, ptr %ptr1
%val2 = load double, ptr %ptr2
%val3 = load double, ptr %ptr3
%val4 = load double, ptr %ptr4
%val5 = load double, ptr %ptr5
%val6 = load double, ptr %ptr6
%val7 = load double, ptr %ptr7
%val8 = load double, ptr %ptr8
%val9 = load double, ptr %ptr9
call void @foo()
store double %val0, ptr %ptr0
store double %val1, ptr %ptr1
store double %val2, ptr %ptr2
store double %val3, ptr %ptr3
store double %val4, ptr %ptr4
store double %val5, ptr %ptr5
store double %val6, ptr %ptr6
store double %val7, ptr %ptr7
store double %val8, ptr %ptr8
store double %val9, ptr %ptr9
ret void
}
; Repeat f2 with atomic accesses. We shouldn't use MVC here.
define dso_local void @f6(ptr %ptr0) {
; CHECK-LABEL: f6:
; CHECK-NOT: mvc
; CHECK: br %r14
%ptr1 = getelementptr i32, ptr %ptr0, i64 2
%ptr2 = getelementptr i32, ptr %ptr0, i64 4
%ptr3 = getelementptr i32, ptr %ptr0, i64 6
%ptr4 = getelementptr i32, ptr %ptr0, i64 8
%ptr5 = getelementptr i32, ptr %ptr0, i64 10
%ptr6 = getelementptr i32, ptr %ptr0, i64 12
%ptr7 = getelementptr i32, ptr %ptr0, i64 14
%ptr8 = getelementptr i32, ptr %ptr0, i64 16
%val0 = load atomic i32, ptr %ptr0 unordered, align 4
%val1 = load atomic i32, ptr %ptr1 unordered, align 4
%val2 = load atomic i32, ptr %ptr2 unordered, align 4
%val3 = load atomic i32, ptr %ptr3 unordered, align 4
%val4 = load atomic i32, ptr %ptr4 unordered, align 4
%val5 = load atomic i32, ptr %ptr5 unordered, align 4
%val6 = load atomic i32, ptr %ptr6 unordered, align 4
%val7 = load atomic i32, ptr %ptr7 unordered, align 4
%val8 = load atomic i32, ptr %ptr8 unordered, align 4
call void @foo()
store atomic i32 %val0, ptr %ptr0 unordered, align 4
store atomic i32 %val1, ptr %ptr1 unordered, align 4
store atomic i32 %val2, ptr %ptr2 unordered, align 4
store atomic i32 %val3, ptr %ptr3 unordered, align 4
store atomic i32 %val4, ptr %ptr4 unordered, align 4
store atomic i32 %val5, ptr %ptr5 unordered, align 4
store atomic i32 %val6, ptr %ptr6 unordered, align 4
store atomic i32 %val7, ptr %ptr7 unordered, align 4
store atomic i32 %val8, ptr %ptr8 unordered, align 4
ret void
}
; ...likewise volatile accesses.
define dso_local void @f7(ptr %ptr0) {
; CHECK-LABEL: f7:
; CHECK-NOT: mvc
; CHECK: br %r14
%ptr1 = getelementptr i32, ptr %ptr0, i64 2
%ptr2 = getelementptr i32, ptr %ptr0, i64 4
%ptr3 = getelementptr i32, ptr %ptr0, i64 6
%ptr4 = getelementptr i32, ptr %ptr0, i64 8
%ptr5 = getelementptr i32, ptr %ptr0, i64 10
%ptr6 = getelementptr i32, ptr %ptr0, i64 12
%ptr7 = getelementptr i32, ptr %ptr0, i64 14
%ptr8 = getelementptr i32, ptr %ptr0, i64 16
%val0 = load volatile i32, ptr %ptr0
%val1 = load volatile i32, ptr %ptr1
%val2 = load volatile i32, ptr %ptr2
%val3 = load volatile i32, ptr %ptr3
%val4 = load volatile i32, ptr %ptr4
%val5 = load volatile i32, ptr %ptr5
%val6 = load volatile i32, ptr %ptr6
%val7 = load volatile i32, ptr %ptr7
%val8 = load volatile i32, ptr %ptr8
call void @foo()
store volatile i32 %val0, ptr %ptr0
store volatile i32 %val1, ptr %ptr1
store volatile i32 %val2, ptr %ptr2
store volatile i32 %val3, ptr %ptr3
store volatile i32 %val4, ptr %ptr4
store volatile i32 %val5, ptr %ptr5
store volatile i32 %val6, ptr %ptr6
store volatile i32 %val7, ptr %ptr7
store volatile i32 %val8, ptr %ptr8
ret void
}
; Check that LRL and STRL are not converted.
define dso_local void @f8() {
; CHECK-LABEL: f8:
; CHECK-NOT: mvc
; CHECK: br %r14
%val0 = load i32, ptr@g0
%val1 = load i32, ptr@g1
%val2 = load i32, ptr@g2
%val3 = load i32, ptr@g3
%val4 = load i32, ptr@g4
%val5 = load i32, ptr@g5
%val6 = load i32, ptr@g6
%val7 = load i32, ptr@g7
%val8 = load i32, ptr@g8
%val9 = load i32, ptr@g9
call void @foo()
store i32 %val0, ptr@g0
store i32 %val1, ptr@g1
store i32 %val2, ptr@g2
store i32 %val3, ptr@g3
store i32 %val4, ptr@g4
store i32 %val5, ptr@g5
store i32 %val6, ptr@g6
store i32 %val7, ptr@g7
store i32 %val8, ptr@g8
store i32 %val9, ptr@g9
ret void
}
; Likewise LGRL and STGRL.
define dso_local void @f9() {
; CHECK-LABEL: f9:
; CHECK-NOT: mvc
; CHECK: br %r14
%val0 = load i64, ptr@h0
%val1 = load i64, ptr@h1
%val2 = load i64, ptr@h2
%val3 = load i64, ptr@h3
%val4 = load i64, ptr@h4
%val5 = load i64, ptr@h5
%val6 = load i64, ptr@h6
%val7 = load i64, ptr@h7
%val8 = load i64, ptr@h8
%val9 = load i64, ptr@h9
call void @foo()
store i64 %val0, ptr@h0
store i64 %val1, ptr@h1
store i64 %val2, ptr@h2
store i64 %val3, ptr@h3
store i64 %val4, ptr@h4
store i64 %val5, ptr@h5
store i64 %val6, ptr@h6
store i64 %val7, ptr@h7
store i64 %val8, ptr@h8
store i64 %val9, ptr@h9
ret void
}
; This showed a problem with the way stack coloring updated instructions.
; The copy from %val9 to %newval8 can be done using an MVC, which then
; has two frame index operands. Stack coloring chose a valid renumbering
; [FI0, FI1] -> [FI1, FI2], but applied it in the form FI0 -> FI1 -> FI2,
; so that both operands ended up being the same.
define dso_local void @f10() {
; CHECK-LABEL: f10:
; CHECK: lgrl [[REG:%r[0-9]+]], h9
; CHECK: stg [[REG]], [[VAL9:[0-9]+]](%r15)
; CHECK: brasl %r14, foo@PLT
; CHECK: brasl %r14, foo@PLT
; CHECK: mvc [[NEWVAL8:[0-9]+]](8,%r15), [[VAL9]](%r15)
; CHECK: brasl %r14, foo@PLT
; CHECK: lg [[REG:%r[0-9]+]], [[NEWVAL8]](%r15)
; CHECK: stgrl [[REG]], h8
; CHECK: br %r14
entry:
%val8 = load volatile i64, ptr@h8
%val0 = load volatile i64, ptr@h0
%val1 = load volatile i64, ptr@h1
%val2 = load volatile i64, ptr@h2
%val3 = load volatile i64, ptr@h3
%val4 = load volatile i64, ptr@h4
%val5 = load volatile i64, ptr@h5
%val6 = load volatile i64, ptr@h6
%val7 = load volatile i64, ptr@h7
%val9 = load volatile i64, ptr@h9
call void @foo()
store volatile i64 %val0, ptr@h0
store volatile i64 %val1, ptr@h1
store volatile i64 %val2, ptr@h2
store volatile i64 %val3, ptr@h3
store volatile i64 %val4, ptr@h4
store volatile i64 %val5, ptr@h5
store volatile i64 %val6, ptr@h6
store volatile i64 %val7, ptr@h7
%check = load volatile i64, ptr@h0
%cond = icmp eq i64 %check, 0
br i1 %cond, label %skip, label %fallthru
fallthru:
call void @foo()
store volatile i64 %val0, ptr@h0
store volatile i64 %val1, ptr@h1
store volatile i64 %val2, ptr@h2
store volatile i64 %val3, ptr@h3
store volatile i64 %val4, ptr@h4
store volatile i64 %val5, ptr@h5
store volatile i64 %val6, ptr@h6
store volatile i64 %val7, ptr@h7
store volatile i64 %val8, ptr@h8
br label %skip
skip:
%newval8 = phi i64 [ %val8, %entry ], [ %val9, %fallthru ]
call void @foo()
store volatile i64 %val0, ptr@h0
store volatile i64 %val1, ptr@h1
store volatile i64 %val2, ptr@h2
store volatile i64 %val3, ptr@h3
store volatile i64 %val4, ptr@h4
store volatile i64 %val5, ptr@h5
store volatile i64 %val6, ptr@h6
store volatile i64 %val7, ptr@h7
store volatile i64 %newval8, ptr@h8
store volatile i64 %val9, ptr@h9
ret void
}
; This used to generate a no-op MVC. It is very sensitive to spill heuristics.
define dso_local void @f11() {
; CHECK-LABEL: f11:
; CHECK-NOT: mvc [[OFFSET:[0-9]+]](8,%r15), [[OFFSET]](%r15)
; CHECK: br %r14
entry:
%val0 = load volatile i64, ptr@h0
%val1 = load volatile i64, ptr@h1
%val2 = load volatile i64, ptr@h2
%val3 = load volatile i64, ptr@h3
%val4 = load volatile i64, ptr@h4
%val5 = load volatile i64, ptr@h5
%val6 = load volatile i64, ptr@h6
%val7 = load volatile i64, ptr@h7
%altval0 = load volatile i64, ptr@h0
%altval1 = load volatile i64, ptr@h1
call void @foo()
store volatile i64 %val0, ptr@h0
store volatile i64 %val1, ptr@h1
store volatile i64 %val2, ptr@h2
store volatile i64 %val3, ptr@h3
store volatile i64 %val4, ptr@h4
store volatile i64 %val5, ptr@h5
store volatile i64 %val6, ptr@h6
store volatile i64 %val7, ptr@h7
%check = load volatile i64, ptr@h0
%cond = icmp eq i64 %check, 0
br i1 %cond, label %a1, label %b1
a1:
call void @foo()
br label %join1
b1:
call void @foo()
br label %join1
join1:
%newval0 = phi i64 [ %val0, %a1 ], [ %altval0, %b1 ]
call void @foo()
store volatile i64 %val1, ptr@h1
store volatile i64 %val2, ptr@h2
store volatile i64 %val3, ptr@h3
store volatile i64 %val4, ptr@h4
store volatile i64 %val5, ptr@h5
store volatile i64 %val6, ptr@h6
store volatile i64 %val7, ptr@h7
br i1 %cond, label %a2, label %b2
a2:
call void @foo()
br label %join2
b2:
call void @foo()
br label %join2
join2:
%newval1 = phi i64 [ %val1, %a2 ], [ %altval1, %b2 ]
call void @foo()
store volatile i64 %val2, ptr@h2
store volatile i64 %val3, ptr@h3
store volatile i64 %val4, ptr@h4
store volatile i64 %val5, ptr@h5
store volatile i64 %val6, ptr@h6
store volatile i64 %val7, ptr@h7
call void @foo()
store volatile i64 %newval0, ptr@h0
store volatile i64 %newval1, ptr@h1
store volatile i64 %val2, ptr@h2
store volatile i64 %val3, ptr@h3
store volatile i64 %val4, ptr@h4
store volatile i64 %val5, ptr@h5
store volatile i64 %val6, ptr@h6
store volatile i64 %val7, ptr@h7
ret void
}
Reference in New Issue View Git Blame Copy Permalink