141 lines
3.8 KiB
LLVM
141 lines
3.8 KiB
LLVM
|
; RUN: opt -consthoist -S < %s | FileCheck %s
|
||
|
|
target triple = "thumbv6m-none-eabi"
|
||
|
|
|
||
|
|
; Allocas in the entry block get handled (for free) by
|
||
|
|
; prologue/epilogue. Elsewhere they're fair game though.
|
||
|
|
define void @avoid_allocas() {
|
||
|
|
; CHECK-LABEL: @avoid_allocas
|
||
|
|
; CHECK: %addr1 = alloca i8, i32 1000
|
||
|
|
; CHECK: %addr2 = alloca i8, i32 1020
|
||
|
|
|
||
|
|
%addr1 = alloca i8, i32 1000
|
||
|
|
%addr2 = alloca i8, i32 1020
|
||
|
|
br label %elsewhere
|
||
|
|
|
||
|
|
elsewhere:
|
||
|
|
; CHECK: [[BASE:%.*]] = bitcast i32 1000 to i32
|
||
|
|
; CHECK: alloca i8, i32 [[BASE]]
|
||
|
|
; CHECK: [[NEXT:%.*]] = add i32 [[BASE]], 20
|
||
|
|
; CHECK: alloca i8, i32 [[NEXT]]
|
||
|
|
|
||
|
|
%addr3 = alloca i8, i32 1000
|
||
|
|
%addr4 = alloca i8, i32 1020
|
||
|
|
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
; The case values of switch instructions are required to be constants.
|
||
|
|
define void @avoid_switch(i32 %in) {
|
||
|
|
; CHECK-LABEL: @avoid_switch
|
||
|
|
; CHECK: switch i32 %in, label %default [
|
||
|
|
; CHECK: i32 1000, label %bb1
|
||
|
|
; CHECK: i32 1020, label %bb2
|
||
|
|
; CHECK: ]
|
||
|
|
|
||
|
|
switch i32 %in, label %default
|
||
|
|
[ i32 1000, label %bb1
|
||
|
|
i32 1020, label %bb2 ]
|
||
|
|
|
||
|
|
bb1:
|
||
|
|
ret void
|
||
|
|
|
||
|
|
bb2:
|
||
|
|
ret void
|
||
|
|
|
||
|
|
default:
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
; We don't want to convert constant divides because the benefit from converting
|
||
|
|
; them to a mul in the backend is larget than constant materialization savings.
|
||
|
|
define void @signed_const_division(i32 %in1, i32 %in2, i32* %addr) {
|
||
|
|
; CHECK-LABEL: @signed_const_division
|
||
|
|
; CHECK: %res1 = sdiv i32 %l1, 1000000000
|
||
|
|
; CHECK: %res2 = srem i32 %l2, 1000000000
|
||
|
|
entry:
|
||
|
|
br label %loop
|
||
|
|
|
||
|
|
loop:
|
||
|
|
%l1 = phi i32 [%res1, %loop], [%in1, %entry]
|
||
|
|
%l2 = phi i32 [%res2, %loop], [%in2, %entry]
|
||
|
|
%res1 = sdiv i32 %l1, 1000000000
|
||
|
|
store volatile i32 %res1, i32* %addr
|
||
|
|
%res2 = srem i32 %l2, 1000000000
|
||
|
|
store volatile i32 %res2, i32* %addr
|
||
|
|
%again = icmp eq i32 %res1, %res2
|
||
|
|
br i1 %again, label %loop, label %end
|
||
|
|
|
||
|
|
end:
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
define void @unsigned_const_division(i32 %in1, i32 %in2, i32* %addr) {
|
||
|
|
; CHECK-LABEL: @unsigned_const_division
|
||
|
|
; CHECK: %res1 = udiv i32 %l1, 1000000000
|
||
|
|
; CHECK: %res2 = urem i32 %l2, 1000000000
|
||
|
|
|
||
|
|
entry:
|
||
|
|
br label %loop
|
||
|
|
|
||
|
|
loop:
|
||
|
|
%l1 = phi i32 [%res1, %loop], [%in1, %entry]
|
||
|
|
%l2 = phi i32 [%res2, %loop], [%in2, %entry]
|
||
|
|
%res1 = udiv i32 %l1, 1000000000
|
||
|
|
store volatile i32 %res1, i32* %addr
|
||
|
|
%res2 = urem i32 %l2, 1000000000
|
||
|
|
store volatile i32 %res2, i32* %addr
|
||
|
|
%again = icmp eq i32 %res1, %res2
|
||
|
|
br i1 %again, label %loop, label %end
|
||
|
|
|
||
|
|
end:
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
;PR 28282: even when data type is larger than 64-bit, the bit width of the
|
||
|
|
;constant operand could be smaller than 64-bit. In this case, there is no
|
||
|
|
;benefit to hoist the constant.
|
||
|
|
define i32 @struct_type_test(i96 %a0, i96 %a1) {
|
||
|
|
;CHECK-LABEL: @struct_type_test
|
||
|
|
entry:
|
||
|
|
;CHECK-NOT: %const = bitcast i96 32 to i96
|
||
|
|
;CHECK: lshr0 = lshr i96 %a0, 32
|
||
|
|
%lshr0 = lshr i96 %a0, 32
|
||
|
|
%cast0 = trunc i96 %lshr0 to i32
|
||
|
|
;CHECK: lshr1 = lshr i96 %a1, 32
|
||
|
|
%lshr1 = lshr i96 %a1, 32
|
||
|
|
%cast1 = trunc i96 %lshr1 to i32
|
||
|
|
%ret = add i32 %cast0, %cast1
|
||
|
|
ret i32 %ret
|
||
|
|
}
|
||
|
|
|
||
|
|
@exception_type = external global i8
|
||
|
|
|
||
|
|
; Constants in inline ASM should not be hoisted.
|
||
|
|
define i32 @inline_asm_invoke() personality i8* null {
|
||
|
|
;CHECK-LABEL: @inline_asm_invoke
|
||
|
|
;CHECK-NOT: %const = 214672
|
||
|
|
;CHECK: %X = invoke i32 asm "bswap $0", "=r,r"(i32 214672)
|
||
|
|
%X = invoke i32 asm "bswap $0", "=r,r"(i32 214672)
|
||
|
|
to label %L unwind label %lpad
|
||
|
|
;CHECK: %Y = invoke i32 asm "bswap $0", "=r,r"(i32 214672)
|
||
|
|
%Y = invoke i32 asm "bswap $0", "=r,r"(i32 214672)
|
||
|
|
to label %L unwind label %lpad
|
||
|
|
L:
|
||
|
|
ret i32 %X
|
||
|
|
lpad:
|
||
|
|
%lp = landingpad i32
|
||
|
|
cleanup
|
||
|
|
catch i8* @exception_type
|
||
|
|
ret i32 1
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32 @inline_asm_call() {
|
||
|
|
;CHECK-LABEL: @inline_asm_call
|
||
|
|
;CHECK-NOT: %const = 214672
|
||
|
|
;CHECK: %X = call i32 asm "bswap $0", "=r,r"(i32 214672)
|
||
|
|
%X = call i32 asm "bswap $0", "=r,r"(i32 214672)
|
||
|
|
;CHECK: %Y = call i32 asm "bswap $0", "=r,r"(i32 214672)
|
||
|
|
%Y = call i32 asm "bswap $0", "=r,r"(i32 214672)
|
||
|
|
ret i32 %X
|
||
|
|
}
|