llvm/test/CodeGen/SPARC/64abi.ll
Nirav Dave acc2c1d71d Elide stores which are overwritten without being observed.
Summary:
In SelectionDAG, when a store is immediately chained to another store
to the same address, elide the first store as it has no observable
effects. This is causes small improvements dealing with intrinsics
lowered to stores.

Test notes:

* Many testcases overwrite store addresses multiple times and needed
  minor changes, mainly making stores volatile to prevent the
  optimization from optimizing the test away.

* Many X86 test cases optimized out instructions associated with
  associated with va_start.

* Note that test_splat in CodeGen/AArch64/misched-stp.ll no longer has
  dependencies to check and can probably be removed and potentially
  replaced with another test.

Reviewers: rnk, john.brawn

Subscribers: aemerson, rengolin, qcolombet, jyknight, nemanjai, nhaehnle, javed.absar, llvm-commits

Differential Revision: https://reviews.llvm.org/D33206

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@303198 91177308-0d34-0410-b5e6-96231b3b80d8
2017-05-16 19:43:56 +00:00

546 lines
16 KiB
LLVM

; RUN: llc < %s -march=sparcv9 -disable-sparc-delay-filler -disable-sparc-leaf-proc | FileCheck %s --check-prefix=CHECK --check-prefix=HARD
; RUN: llc < %s -march=sparcv9 -disable-sparc-delay-filler -disable-sparc-leaf-proc -mattr=soft-float | FileCheck %s --check-prefix=CHECK --check-prefix=SOFT
; CHECK-LABEL: intarg:
; The save/restore frame is not strictly necessary here, but we would need to
; refer to %o registers instead.
; CHECK: save %sp, -128, %sp
; CHECK: ldx [%fp+2231], [[R2:%[gilo][0-7]]]
; CHECK: ld [%fp+2227], [[R1:%[gilo][0-7]]]
; CHECK: stb %i0, [%i4]
; CHECK: stb %i1, [%i4]
; CHECK: sth %i2, [%i4]
; CHECK: st %i3, [%i4]
; CHECK: stx %i4, [%i4]
; CHECK: st %i5, [%i4]
; CHECK: st [[R1]], [%i4]
; CHECK: stx [[R2]], [%i4]
; CHECK: restore
define void @intarg(i8 %a0, ; %i0
i8 %a1, ; %i1
i16 %a2, ; %i2
i32 %a3, ; %i3
i8* %a4, ; %i4
i32 %a5, ; %i5
i32 signext %a6, ; [%fp+BIAS+176]
i8* %a7) { ; [%fp+BIAS+184]
store volatile i8 %a0, i8* %a4
store volatile i8 %a1, i8* %a4
%p16 = bitcast i8* %a4 to i16*
store volatile i16 %a2, i16* %p16
%p32 = bitcast i8* %a4 to i32*
store volatile i32 %a3, i32* %p32
%pp = bitcast i8* %a4 to i8**
store volatile i8* %a4, i8** %pp
store volatile i32 %a5, i32* %p32
store volatile i32 %a6, i32* %p32
store volatile i8* %a7, i8** %pp
ret void
}
; CHECK-LABEL: call_intarg:
; 16 saved + 8 args.
; CHECK: save %sp, -192, %sp
; Sign-extend and store the full 64 bits.
; CHECK: sra %i0, 0, [[R:%[gilo][0-7]]]
; Use %o0-%o5 for outgoing arguments
; CHECK: mov 5, %o5
; CHECK: stx [[R]], [%sp+2223]
; CHECK: call intarg
; CHECK-NOT: add %sp
; CHECK: restore
define void @call_intarg(i32 %i0, i8* %i1) {
call void @intarg(i8 0, i8 1, i16 2, i32 3, i8* undef, i32 5, i32 %i0, i8* %i1)
ret void
}
; CHECK-LABEL: floatarg:
; HARD: save %sp, -128, %sp
; HARD: ld [%fp+2307], [[F:%f[0-9]+]]
; HARD: fstod %f1,
; HARD: faddd %f2,
; HARD: faddd %f4,
; HARD: faddd %f6,
; HARD: fadds %f31, [[F]]
; SOFT: save %sp, -176, %sp
; SOFT: srl %i0, 0, %o0
; SOFT-NEXT: call __extendsfdf2
; SOFT: mov %o0, %i0
; SOFT: mov %i1, %o0
; SOFT: mov %i2, %o0
; SOFT: mov %i3, %o0
; SOFT: ld [%fp+2299], %o0
; SOFT: ld [%fp+2307], %o1
define double @floatarg(float %a0, ; %f1
double %a1, ; %d2
double %a2, ; %d4
double %a3, ; %d6
float %a4, ; %f9
float %a5, ; %f11
float %a6, ; %f13
float %a7, ; %f15
float %a8, ; %f17
float %a9, ; %f19
float %a10, ; %f21
float %a11, ; %f23
float %a12, ; %f25
float %a13, ; %f27
float %a14, ; %f29
float %a15, ; %f31
float %a16, ; [%fp+BIAS+256] (using 8 bytes)
double %a17) { ; [%fp+BIAS+264] (using 8 bytes)
%d0 = fpext float %a0 to double
%s1 = fadd double %a1, %d0
%s2 = fadd double %a2, %s1
%s3 = fadd double %a3, %s2
%s16 = fadd float %a15, %a16
%d16 = fpext float %s16 to double
%s17 = fadd double %d16, %s3
ret double %s17
}
; CHECK-LABEL: call_floatarg:
; CHECK: save %sp, -272, %sp
; Store 8 bytes in full slot.
; HARD: std %f2, [%sp+2311]
; Store 4 bytes, right-aligned in slot.
; HARD: st %f1, [%sp+2307]
; HARD: fmovd %f2, %f4
; SOFT: stx %i1, [%sp+2311]
; SOFT: stx %i0, [%sp+2303]
; SOFT: stx %i2, [%sp+2295]
; SOFT: stx %i2, [%sp+2287]
; SOFT: stx %i2, [%sp+2279]
; SOFT: stx %i2, [%sp+2271]
; SOFT: stx %i2, [%sp+2263]
; SOFT: stx %i2, [%sp+2255]
; SOFT: stx %i2, [%sp+2247]
; SOFT: stx %i2, [%sp+2239]
; SOFT: stx %i2, [%sp+2231]
; SOFT: stx %i2, [%sp+2223]
; SOFT: mov %i2, %o0
; SOFT: mov %i1, %o1
; SOFT: mov %i1, %o2
; SOFT: mov %i1, %o3
; SOFT: mov %i2, %o4
; SOFT: mov %i2, %o5
; CHECK: call floatarg
; CHECK-NOT: add %sp
; CHECK: restore
define void @call_floatarg(float %f1, double %d2, float %f5, double *%p) {
%r = call double @floatarg(float %f5, double %d2, double %d2, double %d2,
float %f5, float %f5, float %f5, float %f5,
float %f5, float %f5, float %f5, float %f5,
float %f5, float %f5, float %f5, float %f5,
float %f1, double %d2)
store double %r, double* %p
ret void
}
; CHECK-LABEL: mixedarg:
; CHECK: ldx [%fp+2247]
; CHECK: ldx [%fp+2231]
; SOFT: ldx [%fp+2239], %i0
; HARD: fstod %f3
; HARD: faddd %f6
; HARD: faddd %f16
; SOFT: mov %o0, %i1
; SOFT-NEXT: mov %i3, %o0
; SOFT-NEXT: mov %i1, %o1
; SOFT-NEXT: call __adddf3
; SOFT: mov %o0, %i1
; SOFT-NEXT: mov %i0, %o0
; SOFT-NEXT: mov %i1, %o1
; SOFT-NEXT: call __adddf3
; HARD: std %f0, [%i1]
; SOFT: stx %o0, [%i5]
define void @mixedarg(i8 %a0, ; %i0
float %a1, ; %f3
i16 %a2, ; %i2
double %a3, ; %d6
i13 %a4, ; %i4
float %a5, ; %f11
i64 %a6, ; [%fp+BIAS+176]
double *%a7, ; [%fp+BIAS+184]
double %a8, ; %d16
i16* %a9) { ; [%fp+BIAS+200]
%d1 = fpext float %a1 to double
%s3 = fadd double %a3, %d1
%s8 = fadd double %a8, %s3
store double %s8, double* %a7
store i16 %a2, i16* %a9
ret void
}
; CHECK-LABEL: call_mixedarg:
; CHECK: stx %i2, [%sp+2247]
; SOFT: stx %i1, [%sp+2239]
; CHECK: stx %i0, [%sp+2223]
; HARD: fmovd %f2, %f6
; HARD: fmovd %f2, %f16
; SOFT: mov %i1, %o3
; CHECK: call mixedarg
; CHECK-NOT: add %sp
; CHECK: restore
define void @call_mixedarg(i64 %i0, double %f2, i16* %i2) {
call void @mixedarg(i8 undef,
float undef,
i16 undef,
double %f2,
i13 undef,
float undef,
i64 %i0,
double* undef,
double %f2,
i16* %i2)
ret void
}
; The inreg attribute is used to indicate 32-bit sized struct elements that
; share an 8-byte slot.
; CHECK-LABEL: inreg_fi:
; SOFT: srlx %i0, 32, [[R:%[gilo][0-7]]]
; HARD: fstoi %f1
; SOFT: call __fixsfsi
; HARD: srlx %i0, 32, [[R:%[gilo][0-7]]]
; CHECK: sub [[R]],
define i32 @inreg_fi(i32 inreg %a0, ; high bits of %i0
float inreg %a1) { ; %f1
%b1 = fptosi float %a1 to i32
%rv = sub i32 %a0, %b1
ret i32 %rv
}
; CHECK-LABEL: call_inreg_fi:
; Allocate space for 6 arguments, even when only 2 are used.
; CHECK: save %sp, -176, %sp
; HARD: sllx %i1, 32, %o0
; HARD: fmovs %f5, %f1
; SOFT: srl %i2, 0, %i0
; SOFT: sllx %i1, 32, %i1
; SOFT: or %i1, %i0, %o0
; CHECK: call inreg_fi
define void @call_inreg_fi(i32* %p, i32 %i1, float %f5) {
%x = call i32 @inreg_fi(i32 %i1, float %f5)
ret void
}
; CHECK-LABEL: inreg_ff:
; HARD: fsubs %f0, %f1, %f0
; SOFT: srlx %i0, 32, %o0
; SOFT: srl %i0, 0, %o1
; SOFT: call __subsf3
define float @inreg_ff(float inreg %a0, ; %f0
float inreg %a1) { ; %f1
%rv = fsub float %a0, %a1
ret float %rv
}
; CHECK-LABEL: call_inreg_ff:
; HARD: fmovs %f3, %f0
; HARD: fmovs %f5, %f1
; SOFT: srl %i2, 0, %i0
; SOFT: sllx %i1, 32, %i1
; SOFT: or %i1, %i0, %o0
; CHECK: call inreg_ff
define void @call_inreg_ff(i32* %p, float %f3, float %f5) {
%x = call float @inreg_ff(float %f3, float %f5)
ret void
}
; CHECK-LABEL: inreg_if:
; HARD: fstoi %f0
; SOFT: srlx %i0, 32, %o0
; SOFT: call __fixsfsi
; CHECK: sub %i0
define i32 @inreg_if(float inreg %a0, ; %f0
i32 inreg %a1) { ; low bits of %i0
%b0 = fptosi float %a0 to i32
%rv = sub i32 %a1, %b0
ret i32 %rv
}
; CHECK-LABEL: call_inreg_if:
; HARD: fmovs %f3, %f0
; HARD: mov %i2, %o0
; SOFT: srl %i2, 0, %i0
; SOFT: sllx %i1, 32, %i1
; SOFT: or %i1, %i0, %o0
; CHECK: call inreg_if
define void @call_inreg_if(i32* %p, float %f3, i32 %i2) {
%x = call i32 @inreg_if(float %f3, i32 %i2)
ret void
}
; The frontend shouldn't do this. Just pass i64 instead.
; CHECK-LABEL: inreg_ii:
; CHECK: srlx %i0, 32, [[R:%[gilo][0-7]]]
; CHECK: sub %i0, [[R]], %i0
define i32 @inreg_ii(i32 inreg %a0, ; high bits of %i0
i32 inreg %a1) { ; low bits of %i0
%rv = sub i32 %a1, %a0
ret i32 %rv
}
; CHECK-LABEL: call_inreg_ii:
; CHECK: srl %i2, 0, [[R2:%[gilo][0-7]]]
; CHECK: sllx %i1, 32, [[R1:%[gilo][0-7]]]
; CHECK: or [[R1]], [[R2]], %o0
; CHECK: call inreg_ii
define void @call_inreg_ii(i32* %p, i32 %i1, i32 %i2) {
%x = call i32 @inreg_ii(i32 %i1, i32 %i2)
ret void
}
; Structs up to 32 bytes in size can be returned in registers.
; CHECK-LABEL: ret_i64_pair:
; CHECK: ldx [%i2], %i0
; CHECK: ldx [%i3], %i1
define { i64, i64 } @ret_i64_pair(i32 %a0, i32 %a1, i64* %p, i64* %q) {
%r1 = load i64, i64* %p
%rv1 = insertvalue { i64, i64 } undef, i64 %r1, 0
store i64 0, i64* %p
%r2 = load i64, i64* %q
%rv2 = insertvalue { i64, i64 } %rv1, i64 %r2, 1
ret { i64, i64 } %rv2
}
; CHECK-LABEL: call_ret_i64_pair:
; CHECK: call ret_i64_pair
; CHECK: stx %o0, [%i0]
; CHECK: stx %o1, [%i0]
define void @call_ret_i64_pair(i64* %i0) {
%rv = call { i64, i64 } @ret_i64_pair(i32 undef, i32 undef,
i64* undef, i64* undef)
%e0 = extractvalue { i64, i64 } %rv, 0
store volatile i64 %e0, i64* %i0
%e1 = extractvalue { i64, i64 } %rv, 1
store i64 %e1, i64* %i0
ret void
}
; This is not a C struct, the i32 member uses 8 bytes, but the float only 4.
; CHECK-LABEL: ret_i32_float_pair:
; CHECK: ld [%i2], %i0
; HARD: ld [%i3], %f2
; SOFT: ld [%i3], %i1
define { i32, float } @ret_i32_float_pair(i32 %a0, i32 %a1,
i32* %p, float* %q) {
%r1 = load i32, i32* %p
%rv1 = insertvalue { i32, float } undef, i32 %r1, 0
store i32 0, i32* %p
%r2 = load float, float* %q
%rv2 = insertvalue { i32, float } %rv1, float %r2, 1
ret { i32, float } %rv2
}
; CHECK-LABEL: call_ret_i32_float_pair:
; CHECK: call ret_i32_float_pair
; CHECK: st %o0, [%i0]
; HARD: st %f2, [%i1]
; SOFT: st %o1, [%i1]
define void @call_ret_i32_float_pair(i32* %i0, float* %i1) {
%rv = call { i32, float } @ret_i32_float_pair(i32 undef, i32 undef,
i32* undef, float* undef)
%e0 = extractvalue { i32, float } %rv, 0
store i32 %e0, i32* %i0
%e1 = extractvalue { i32, float } %rv, 1
store float %e1, float* %i1
ret void
}
; This is a C struct, each member uses 4 bytes.
; CHECK-LABEL: ret_i32_float_packed:
; CHECK: ld [%i2], [[R:%[gilo][0-7]]]
; HARD: ld [%i3], %f1
; SOFT: ld [%i3], %i1
; CHECK: sllx [[R]], 32, %i0
define inreg { i32, float } @ret_i32_float_packed(i32 %a0, i32 %a1,
i32* %p, float* %q) {
%r1 = load i32, i32* %p
%rv1 = insertvalue { i32, float } undef, i32 %r1, 0
store i32 0, i32* %p
%r2 = load float, float* %q
%rv2 = insertvalue { i32, float } %rv1, float %r2, 1
ret { i32, float } %rv2
}
; CHECK-LABEL: call_ret_i32_float_packed:
; CHECK: call ret_i32_float_packed
; CHECK: srlx %o0, 32, [[R:%[gilo][0-7]]]
; CHECK: st [[R]], [%i0]
; HARD: st %f1, [%i1]
; SOFT: st %o0, [%i1]
define void @call_ret_i32_float_packed(i32* %i0, float* %i1) {
%rv = call { i32, float } @ret_i32_float_packed(i32 undef, i32 undef,
i32* undef, float* undef)
%e0 = extractvalue { i32, float } %rv, 0
store i32 %e0, i32* %i0
%e1 = extractvalue { i32, float } %rv, 1
store float %e1, float* %i1
ret void
}
; The C frontend should use i64 to return { i32, i32 } structs, but verify that
; we don't miscompile thi case where both struct elements are placed in %i0.
; CHECK-LABEL: ret_i32_packed:
; CHECK: ld [%i2], [[R1:%[gilo][0-7]]]
; CHECK: ld [%i3], [[R2:%[gilo][0-7]]]
; CHECK: sllx [[R2]], 32, [[R3:%[gilo][0-7]]]
; CHECK: or [[R3]], [[R1]], %i0
define inreg { i32, i32 } @ret_i32_packed(i32 %a0, i32 %a1,
i32* %p, i32* %q) {
%r1 = load i32, i32* %p
%rv1 = insertvalue { i32, i32 } undef, i32 %r1, 1
store i32 0, i32* %p
%r2 = load i32, i32* %q
%rv2 = insertvalue { i32, i32 } %rv1, i32 %r2, 0
ret { i32, i32 } %rv2
}
; CHECK-LABEL: call_ret_i32_packed:
; CHECK: call ret_i32_packed
; CHECK: srlx %o0, 32, [[R:%[gilo][0-7]]]
; CHECK: st [[R]], [%i0]
; CHECK: st %o0, [%i1]
define void @call_ret_i32_packed(i32* %i0, i32* %i1) {
%rv = call { i32, i32 } @ret_i32_packed(i32 undef, i32 undef,
i32* undef, i32* undef)
%e0 = extractvalue { i32, i32 } %rv, 0
store i32 %e0, i32* %i0
%e1 = extractvalue { i32, i32 } %rv, 1
store i32 %e1, i32* %i1
ret void
}
; The return value must be sign-extended to 64 bits.
; CHECK-LABEL: ret_sext:
; CHECK: sra %i0, 0, %i0
define signext i32 @ret_sext(i32 %a0) {
ret i32 %a0
}
; CHECK-LABEL: ret_zext:
; CHECK: srl %i0, 0, %i0
define zeroext i32 @ret_zext(i32 %a0) {
ret i32 %a0
}
; CHECK-LABEL: ret_nosext:
; CHECK-NOT: sra
define signext i32 @ret_nosext(i32 signext %a0) {
ret i32 %a0
}
; CHECK-LABEL: ret_nozext:
; CHECK-NOT: srl
define signext i32 @ret_nozext(i32 signext %a0) {
ret i32 %a0
}
; CHECK-LABEL: test_register_directive:
; CHECK: .register %g2, #scratch
; CHECK: .register %g3, #scratch
; CHECK: add %i0, 2, %g2
; CHECK: add %i0, 3, %g3
define i32 @test_register_directive(i32 %i0) {
entry:
%0 = add nsw i32 %i0, 2
%1 = add nsw i32 %i0, 3
tail call void asm sideeffect "", "r,r,~{l0},~{l1},~{l2},~{l3},~{l4},~{l5},~{l6},~{l7},~{i0},~{i1},~{i2},~{i3},~{i4},~{i5},~{i6},~{i7},~{o0},~{o1},~{o2},~{o3},~{o4},~{o5},~{o6},~{o7},~{g1},~{g4},~{g5},~{g6},~{g7}"(i32 %0, i32 %1)
%2 = add nsw i32 %0, %1
ret i32 %2
}
; CHECK-LABEL: test_large_stack:
; CHECK: sethi 16, %g1
; CHECK: xor %g1, -176, %g1
; CHECK: save %sp, %g1, %sp
; CHECK: sethi 14, %g1
; CHECK: xor %g1, -1, %g1
; CHECK: add %g1, %fp, %g1
; CHECK: call use_buf
define i32 @test_large_stack() {
entry:
%buffer1 = alloca [16384 x i8], align 8
%buffer1.sub = getelementptr inbounds [16384 x i8], [16384 x i8]* %buffer1, i32 0, i32 0
%0 = call i32 @use_buf(i32 16384, i8* %buffer1.sub)
ret i32 %0
}
declare i32 @use_buf(i32, i8*)
; CHECK-LABEL: test_fp128_args:
; HARD-DAG: std %f0, [%fp+{{.+}}]
; HARD-DAG: std %f2, [%fp+{{.+}}]
; HARD-DAG: std %f6, [%fp+{{.+}}]
; HARD-DAG: std %f4, [%fp+{{.+}}]
; HARD: add %fp, [[Offset:[0-9]+]], %o0
; HARD: call _Qp_add
; HARD: ldd [%fp+[[Offset]]], %f0
; SOFT-DAG: mov %i0, %o0
; SOFT-DAG: mov %i1, %o1
; SOFT-DAG: mov %i2, %o2
; SOFT-DAG: mov %i3, %o3
; SOFT: call __addtf3
; SOFT: mov %o0, %i0
; SOFT: mov %o1, %i1
define fp128 @test_fp128_args(fp128 %a, fp128 %b) {
entry:
%0 = fadd fp128 %a, %b
ret fp128 %0
}
declare i64 @receive_fp128(i64 %a, ...)
; CHECK-LABEL: test_fp128_variable_args:
; HARD-DAG: std %f4, [%sp+[[Offset0:[0-9]+]]]
; HARD-DAG: std %f6, [%sp+[[Offset1:[0-9]+]]]
; HARD-DAG: ldx [%sp+[[Offset0]]], %o2
; HARD-DAG: ldx [%sp+[[Offset1]]], %o3
; SOFT-DAG: mov %i0, %o0
; SOFT-DAG: mov %i1, %o1
; SOFT-DAG: mov %i2, %o2
; CHECK: call receive_fp128
define i64 @test_fp128_variable_args(i64 %a, fp128 %b) {
entry:
%0 = call i64 (i64, ...) @receive_fp128(i64 %a, fp128 %b)
ret i64 %0
}
; CHECK-LABEL: test_call_libfunc:
; HARD: st %f1, [%fp+[[Offset0:[0-9]+]]]
; HARD: fmovs %f3, %f1
; SOFT: srl %i1, 0, %o0
; CHECK: call cosf
; HARD: st %f0, [%fp+[[Offset1:[0-9]+]]]
; HARD: ld [%fp+[[Offset0]]], %f1
; SOFT: mov %o0, %i1
; SOFT: srl %i0, 0, %o0
; CHECK: call sinf
; HARD: ld [%fp+[[Offset1]]], %f1
; HARD: fmuls %f1, %f0, %f0
; SOFT: mov %o0, %i0
; SOFT: mov %i1, %o0
; SOFT: mov %i0, %o1
; SOFT: call __mulsf3
; SOFT: sllx %o0, 32, %i0
define inreg float @test_call_libfunc(float %arg0, float %arg1) {
entry:
%0 = tail call inreg float @cosf(float %arg1)
%1 = tail call inreg float @sinf(float %arg0)
%2 = fmul float %0, %1
ret float %2
}
declare inreg float @cosf(float %arg) readnone nounwind
declare inreg float @sinf(float %arg) readnone nounwind