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; RUN: llc -mtriple=armv7-linux-gnueabihf %s -o - | FileCheck %s
; [2 x i64] should be contiguous when split (e.g. we shouldn't try to align all
; i32 components to 64 bits). Also makes sure i64 based types are properly
; aligned on the stack.
define i64 @test_i64_contiguous_on_stack([8 x double], float, i32 %in, [2 x i64] %arg) nounwind {
; CHECK-LABEL: test_i64_contiguous_on_stack:
; CHECK-DAG: ldr [[LO0:r[0-9]+]], [sp, #8]
; CHECK-DAG: ldr [[HI0:r[0-9]+]], [sp, #12]
; CHECK-DAG: ldr [[LO1:r[0-9]+]], [sp, #16]
; CHECK-DAG: ldr [[HI1:r[0-9]+]], [sp, #20]
; CHECK: adds r0, [[LO0]], [[LO1]]
; CHECK: adc r1, [[HI0]], [[HI1]]
%val1 = extractvalue [2 x i64] %arg, 0
%val2 = extractvalue [2 x i64] %arg, 1
%sum = add i64 %val1, %val2
ret i64 %sum
}
; [2 x i64] should try to use looks for 4 regs, not 8 (which might happen if the
; i64 -> i32, i32 split wasn't handled correctly).
define i64 @test_2xi64_uses_4_regs([8 x double], float, [2 x i64] %arg) nounwind {
; CHECK-LABEL: test_2xi64_uses_4_regs:
; CHECK-DAG: mov r0, r2
; CHECK-DAG: mov r1, r3
%val = extractvalue [2 x i64] %arg, 1
ret i64 %val
}
; An aggregate should be able to split between registers and stack if there is
; nothing else on the stack.
define i32 @test_aggregates_split([8 x double], i32, [4 x i32] %arg) nounwind {
; CHECK-LABEL: test_aggregates_split:
; CHECK: ldr [[VAL3:r[0-9]+]], [sp]
; CHECK: add r0, r1, [[VAL3]]
%val0 = extractvalue [4 x i32] %arg, 0
%val3 = extractvalue [4 x i32] %arg, 3
%sum = add i32 %val0, %val3
ret i32 %sum
}
; If an aggregate has to be moved entirely onto the stack, nothing should be
; able to use r0-r3 any more. Also checks that [2 x i64] properly aligned when
; it uses regs.
define i32 @test_no_int_backfilling([8 x double], float, i32, [2 x i64], i32 %arg) nounwind {
; CHECK-LABEL: test_no_int_backfilling:
; CHECK: ldr r0, [sp, #24]
ret i32 %arg
}
; Even if the argument was successfully allocated as reg block, there should be
; no backfillig to r1.
define i32 @test_no_int_backfilling_regsonly(i32, [1 x i64], i32 %arg) {
; CHECK-LABEL: test_no_int_backfilling_regsonly:
; CHECK: ldr r0, [sp]
ret i32 %arg
}
; If an aggregate has to be moved entirely onto the stack, nothing should be
; able to use r0-r3 any more.
define float @test_no_float_backfilling([7 x double], [4 x i32], i32, [4 x double], float %arg) nounwind {
; CHECK-LABEL: test_no_float_backfilling:
; CHECK: vldr s0, [sp, #40]
ret float %arg
}
; They're a bit pointless, but types like [N x i8] should work as well.
define i8 @test_i8_in_regs(i32, [3 x i8] %arg) {
; CHECK-LABEL: test_i8_in_regs:
; CHECK: add r0, r1, r3
%val0 = extractvalue [3 x i8] %arg, 0
%val2 = extractvalue [3 x i8] %arg, 2
%sum = add i8 %val0, %val2
ret i8 %sum
}
define i16 @test_i16_split(i32, i32, [3 x i16] %arg) {
; CHECK-LABEL: test_i16_split:
; CHECK: ldrh [[VAL2:r[0-9]+]], [sp]
; CHECK: add r0, r2, [[VAL2]]
%val0 = extractvalue [3 x i16] %arg, 0
%val2 = extractvalue [3 x i16] %arg, 2
%sum = add i16 %val0, %val2
ret i16 %sum
}
; Beware: on the stack each i16 still gets a 32-bit slot, the array is not
; packed.
define i16 @test_i16_forced_stack([8 x double], double, i32, i32, [3 x i16] %arg) {
; CHECK-LABEL: test_i16_forced_stack:
; CHECK-DAG: ldrh [[VAL0:r[0-9]+]], [sp, #8]
; CHECK-DAG: ldrh [[VAL2:r[0-9]+]], [sp, #16]
; CHECK: add r0, [[VAL0]], [[VAL2]]
%val0 = extractvalue [3 x i16] %arg, 0
%val2 = extractvalue [3 x i16] %arg, 2
%sum = add i16 %val0, %val2
ret i16 %sum
}
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