forked from OSchip/llvm-project
304 lines
8.1 KiB
LLVM
304 lines
8.1 KiB
LLVM
; RUN: opt < %s -div-rem-pairs -S -mtriple=powerpc64-unknown-unknown | FileCheck %s
|
|
|
|
declare void @foo(i32, i32)
|
|
|
|
define void @decompose_illegal_srem_same_block(i32 %a, i32 %b) {
|
|
; CHECK-LABEL: @decompose_illegal_srem_same_block(
|
|
; CHECK-NEXT: [[DIV:%.*]] = sdiv i32 %a, %b
|
|
; CHECK-NEXT: [[TMP1:%.*]] = mul i32 [[DIV]], %b
|
|
; CHECK-NEXT: [[TMP2:%.*]] = sub i32 %a, [[TMP1]]
|
|
; CHECK-NEXT: call void @foo(i32 [[TMP2]], i32 [[DIV]])
|
|
; CHECK-NEXT: ret void
|
|
;
|
|
%rem = srem i32 %a, %b
|
|
%div = sdiv i32 %a, %b
|
|
call void @foo(i32 %rem, i32 %div)
|
|
ret void
|
|
}
|
|
|
|
define void @decompose_illegal_urem_same_block(i32 %a, i32 %b) {
|
|
; CHECK-LABEL: @decompose_illegal_urem_same_block(
|
|
; CHECK-NEXT: [[DIV:%.*]] = udiv i32 %a, %b
|
|
; CHECK-NEXT: [[TMP1:%.*]] = mul i32 [[DIV]], %b
|
|
; CHECK-NEXT: [[TMP2:%.*]] = sub i32 %a, [[TMP1]]
|
|
; CHECK-NEXT: call void @foo(i32 [[TMP2]], i32 [[DIV]])
|
|
; CHECK-NEXT: ret void
|
|
;
|
|
%div = udiv i32 %a, %b
|
|
%rem = urem i32 %a, %b
|
|
call void @foo(i32 %rem, i32 %div)
|
|
ret void
|
|
}
|
|
|
|
; Hoist and optionally decompose the sdiv because it's safe and free.
|
|
; PR31028 - https://bugs.llvm.org/show_bug.cgi?id=31028
|
|
|
|
define i32 @hoist_sdiv(i32 %a, i32 %b) {
|
|
; CHECK-LABEL: @hoist_sdiv(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: [[DIV:%.*]] = sdiv i32 %a, %b
|
|
; CHECK-NEXT: [[TMP0:%.*]] = mul i32 [[DIV]], %b
|
|
; CHECK-NEXT: [[TMP1:%.*]] = sub i32 %a, [[TMP0]]
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP1]], 42
|
|
; CHECK-NEXT: br i1 [[CMP]], label %if, label %end
|
|
; CHECK: if:
|
|
; CHECK-NEXT: br label %end
|
|
; CHECK: end:
|
|
; CHECK-NEXT: [[RET:%.*]] = phi i32 [ [[DIV]], %if ], [ 3, %entry ]
|
|
; CHECK-NEXT: ret i32 [[RET]]
|
|
;
|
|
entry:
|
|
%rem = srem i32 %a, %b
|
|
%cmp = icmp eq i32 %rem, 42
|
|
br i1 %cmp, label %if, label %end
|
|
|
|
if:
|
|
%div = sdiv i32 %a, %b
|
|
br label %end
|
|
|
|
end:
|
|
%ret = phi i32 [ %div, %if ], [ 3, %entry ]
|
|
ret i32 %ret
|
|
}
|
|
|
|
; Hoist and optionally decompose the udiv because it's safe and free.
|
|
|
|
define i64 @hoist_udiv(i64 %a, i64 %b) {
|
|
; CHECK-LABEL: @hoist_udiv(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: [[DIV:%.*]] = udiv i64 %a, %b
|
|
; CHECK-NEXT: [[TMP0:%.*]] = mul i64 [[DIV]], %b
|
|
; CHECK-NEXT: [[TMP1:%.*]] = sub i64 %a, [[TMP0]]
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i64 [[TMP1]], 42
|
|
; CHECK-NEXT: br i1 [[CMP]], label %if, label %end
|
|
; CHECK: if:
|
|
; CHECK-NEXT: br label %end
|
|
; CHECK: end:
|
|
; CHECK-NEXT: [[RET:%.*]] = phi i64 [ [[DIV]], %if ], [ 3, %entry ]
|
|
; CHECK-NEXT: ret i64 [[RET]]
|
|
;
|
|
entry:
|
|
%rem = urem i64 %a, %b
|
|
%cmp = icmp eq i64 %rem, 42
|
|
br i1 %cmp, label %if, label %end
|
|
|
|
if:
|
|
%div = udiv i64 %a, %b
|
|
br label %end
|
|
|
|
end:
|
|
%ret = phi i64 [ %div, %if ], [ 3, %entry ]
|
|
ret i64 %ret
|
|
}
|
|
|
|
; Hoist the srem if it's safe and free, otherwise decompose it.
|
|
|
|
define i16 @hoist_srem(i16 %a, i16 %b) {
|
|
; CHECK-LABEL: @hoist_srem(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: [[DIV:%.*]] = sdiv i16 %a, %b
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i16 [[DIV]], 42
|
|
; CHECK-NEXT: br i1 [[CMP]], label %if, label %end
|
|
; CHECK: if:
|
|
; CHECK-NEXT: [[TMP0:%.*]] = mul i16 [[DIV]], %b
|
|
; CHECK-NEXT: [[TMP1:%.*]] = sub i16 %a, [[TMP0]]
|
|
; CHECK-NEXT: br label %end
|
|
; CHECK: end:
|
|
; CHECK-NEXT: [[RET:%.*]] = phi i16 [ [[TMP1]], %if ], [ 3, %entry ]
|
|
; CHECK-NEXT: ret i16 [[RET]]
|
|
;
|
|
entry:
|
|
%div = sdiv i16 %a, %b
|
|
%cmp = icmp eq i16 %div, 42
|
|
br i1 %cmp, label %if, label %end
|
|
|
|
if:
|
|
%rem = srem i16 %a, %b
|
|
br label %end
|
|
|
|
end:
|
|
%ret = phi i16 [ %rem, %if ], [ 3, %entry ]
|
|
ret i16 %ret
|
|
}
|
|
|
|
; Hoist the urem if it's safe and free, otherwise decompose it.
|
|
|
|
define i8 @hoist_urem(i8 %a, i8 %b) {
|
|
; CHECK-LABEL: @hoist_urem(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: [[DIV:%.*]] = udiv i8 %a, %b
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i8 [[DIV]], 42
|
|
; CHECK-NEXT: br i1 [[CMP]], label %if, label %end
|
|
; CHECK: if:
|
|
; CHECK-NEXT: [[TMP0:%.*]] = mul i8 [[DIV]], %b
|
|
; CHECK-NEXT: [[TMP1:%.*]] = sub i8 %a, [[TMP0]]
|
|
; CHECK-NEXT: br label %end
|
|
; CHECK: end:
|
|
; CHECK-NEXT: [[RET:%.*]] = phi i8 [ [[TMP1]], %if ], [ 3, %entry ]
|
|
; CHECK-NEXT: ret i8 [[RET]]
|
|
;
|
|
entry:
|
|
%div = udiv i8 %a, %b
|
|
%cmp = icmp eq i8 %div, 42
|
|
br i1 %cmp, label %if, label %end
|
|
|
|
if:
|
|
%rem = urem i8 %a, %b
|
|
br label %end
|
|
|
|
end:
|
|
%ret = phi i8 [ %rem, %if ], [ 3, %entry ]
|
|
ret i8 %ret
|
|
}
|
|
|
|
; If the ops don't match, don't do anything: signedness.
|
|
|
|
define i32 @dont_hoist_udiv(i32 %a, i32 %b) {
|
|
; CHECK-LABEL: @dont_hoist_udiv(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: [[REM:%.*]] = srem i32 %a, %b
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[REM]], 42
|
|
; CHECK-NEXT: br i1 [[CMP]], label %if, label %end
|
|
; CHECK: if:
|
|
; CHECK-NEXT: [[DIV:%.*]] = udiv i32 %a, %b
|
|
; CHECK-NEXT: br label %end
|
|
; CHECK: end:
|
|
; CHECK-NEXT: [[RET:%.*]] = phi i32 [ [[DIV]], %if ], [ 3, %entry ]
|
|
; CHECK-NEXT: ret i32 [[RET]]
|
|
;
|
|
entry:
|
|
%rem = srem i32 %a, %b
|
|
%cmp = icmp eq i32 %rem, 42
|
|
br i1 %cmp, label %if, label %end
|
|
|
|
if:
|
|
%div = udiv i32 %a, %b
|
|
br label %end
|
|
|
|
end:
|
|
%ret = phi i32 [ %div, %if ], [ 3, %entry ]
|
|
ret i32 %ret
|
|
}
|
|
|
|
; If the ops don't match, don't do anything: operation.
|
|
|
|
define i32 @dont_hoist_srem(i32 %a, i32 %b) {
|
|
; CHECK-LABEL: @dont_hoist_srem(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: [[REM:%.*]] = urem i32 %a, %b
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[REM]], 42
|
|
; CHECK-NEXT: br i1 [[CMP]], label %if, label %end
|
|
; CHECK: if:
|
|
; CHECK-NEXT: [[REM2:%.*]] = srem i32 %a, %b
|
|
; CHECK-NEXT: br label %end
|
|
; CHECK: end:
|
|
; CHECK-NEXT: [[RET:%.*]] = phi i32 [ [[REM2]], %if ], [ 3, %entry ]
|
|
; CHECK-NEXT: ret i32 [[RET]]
|
|
;
|
|
entry:
|
|
%rem = urem i32 %a, %b
|
|
%cmp = icmp eq i32 %rem, 42
|
|
br i1 %cmp, label %if, label %end
|
|
|
|
if:
|
|
%rem2 = srem i32 %a, %b
|
|
br label %end
|
|
|
|
end:
|
|
%ret = phi i32 [ %rem2, %if ], [ 3, %entry ]
|
|
ret i32 %ret
|
|
}
|
|
|
|
; If the ops don't match, don't do anything: operands.
|
|
|
|
define i32 @dont_hoist_sdiv(i32 %a, i32 %b, i32 %c) {
|
|
; CHECK-LABEL: @dont_hoist_sdiv(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: [[REM:%.*]] = srem i32 %a, %b
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[REM]], 42
|
|
; CHECK-NEXT: br i1 [[CMP]], label %if, label %end
|
|
; CHECK: if:
|
|
; CHECK-NEXT: [[DIV:%.*]] = sdiv i32 %a, %c
|
|
; CHECK-NEXT: br label %end
|
|
; CHECK: end:
|
|
; CHECK-NEXT: [[RET:%.*]] = phi i32 [ [[DIV]], %if ], [ 3, %entry ]
|
|
; CHECK-NEXT: ret i32 [[RET]]
|
|
;
|
|
entry:
|
|
%rem = srem i32 %a, %b
|
|
%cmp = icmp eq i32 %rem, 42
|
|
br i1 %cmp, label %if, label %end
|
|
|
|
if:
|
|
%div = sdiv i32 %a, %c
|
|
br label %end
|
|
|
|
end:
|
|
%ret = phi i32 [ %div, %if ], [ 3, %entry ]
|
|
ret i32 %ret
|
|
}
|
|
|
|
; If the target doesn't have a unified div/rem op for the type, decompose rem in-place to mul+sub.
|
|
|
|
define i128 @dont_hoist_urem(i128 %a, i128 %b) {
|
|
; CHECK-LABEL: @dont_hoist_urem(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: [[DIV:%.*]] = udiv i128 %a, %b
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i128 [[DIV]], 42
|
|
; CHECK-NEXT: br i1 [[CMP]], label %if, label %end
|
|
; CHECK: if:
|
|
; CHECK-NEXT: [[TMP0:%.*]] = mul i128 [[DIV]], %b
|
|
; CHECK-NEXT: [[TMP1:%.*]] = sub i128 %a, [[TMP0]]
|
|
; CHECK-NEXT: br label %end
|
|
; CHECK: end:
|
|
; CHECK-NEXT: [[RET:%.*]] = phi i128 [ [[TMP1]], %if ], [ 3, %entry ]
|
|
; CHECK-NEXT: ret i128 [[RET]]
|
|
;
|
|
entry:
|
|
%div = udiv i128 %a, %b
|
|
%cmp = icmp eq i128 %div, 42
|
|
br i1 %cmp, label %if, label %end
|
|
|
|
if:
|
|
%rem = urem i128 %a, %b
|
|
br label %end
|
|
|
|
end:
|
|
%ret = phi i128 [ %rem, %if ], [ 3, %entry ]
|
|
ret i128 %ret
|
|
}
|
|
|
|
; We don't hoist if one op does not dominate the other,
|
|
; but we could hoist both ops to the common predecessor block?
|
|
|
|
define i32 @no_domination(i1 %cmp, i32 %a, i32 %b) {
|
|
; CHECK-LABEL: @no_domination(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br i1 %cmp, label %if, label %else
|
|
; CHECK: if:
|
|
; CHECK-NEXT: [[DIV:%.*]] = sdiv i32 %a, %b
|
|
; CHECK-NEXT: br label %end
|
|
; CHECK: else:
|
|
; CHECK-NEXT: [[REM:%.*]] = srem i32 %a, %b
|
|
; CHECK-NEXT: br label %end
|
|
; CHECK: end:
|
|
; CHECK-NEXT: [[RET:%.*]] = phi i32 [ [[DIV]], %if ], [ [[REM]], %else ]
|
|
; CHECK-NEXT: ret i32 [[RET]]
|
|
;
|
|
entry:
|
|
br i1 %cmp, label %if, label %else
|
|
|
|
if:
|
|
%div = sdiv i32 %a, %b
|
|
br label %end
|
|
|
|
else:
|
|
%rem = srem i32 %a, %b
|
|
br label %end
|
|
|
|
end:
|
|
%ret = phi i32 [ %div, %if ], [ %rem, %else ]
|
|
ret i32 %ret
|
|
}
|
|
|