mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-07-28 20:29:21 +00:00
af064aeee6
clobbers to forward pieces of large stores to small loads, we need to consider the properly phi translated pointer in the store block. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90978 91177308-0d34-0410-b5e6-96231b3b80d8
535 lines
11 KiB
LLVM
535 lines
11 KiB
LLVM
; RUN: opt < %s -gvn -S | FileCheck %s
|
|
|
|
; 32-bit little endian target.
|
|
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
|
|
|
|
;; Trivial RLE test.
|
|
define i32 @test0(i32 %V, i32* %P) {
|
|
store i32 %V, i32* %P
|
|
|
|
%A = load i32* %P
|
|
ret i32 %A
|
|
; CHECK: @test0
|
|
; CHECK: ret i32 %V
|
|
}
|
|
|
|
|
|
;;===----------------------------------------------------------------------===;;
|
|
;; Tests for crashers
|
|
;;===----------------------------------------------------------------------===;;
|
|
|
|
;; PR5016
|
|
define i8 @crash0({i32, i32} %A, {i32, i32}* %P) {
|
|
store {i32, i32} %A, {i32, i32}* %P
|
|
%X = bitcast {i32, i32}* %P to i8*
|
|
%Y = load i8* %X
|
|
ret i8 %Y
|
|
}
|
|
|
|
|
|
;;===----------------------------------------------------------------------===;;
|
|
;; Store -> Load and Load -> Load forwarding where src and dst are different
|
|
;; types, but where the base pointer is a must alias.
|
|
;;===----------------------------------------------------------------------===;;
|
|
|
|
;; i32 -> f32 forwarding.
|
|
define float @coerce_mustalias1(i32 %V, i32* %P) {
|
|
store i32 %V, i32* %P
|
|
|
|
%P2 = bitcast i32* %P to float*
|
|
|
|
%A = load float* %P2
|
|
ret float %A
|
|
; CHECK: @coerce_mustalias1
|
|
; CHECK-NOT: load
|
|
; CHECK: ret float
|
|
}
|
|
|
|
;; i32* -> float forwarding.
|
|
define float @coerce_mustalias2(i32* %V, i32** %P) {
|
|
store i32* %V, i32** %P
|
|
|
|
%P2 = bitcast i32** %P to float*
|
|
|
|
%A = load float* %P2
|
|
ret float %A
|
|
; CHECK: @coerce_mustalias2
|
|
; CHECK-NOT: load
|
|
; CHECK: ret float
|
|
}
|
|
|
|
;; float -> i32* forwarding.
|
|
define i32* @coerce_mustalias3(float %V, float* %P) {
|
|
store float %V, float* %P
|
|
|
|
%P2 = bitcast float* %P to i32**
|
|
|
|
%A = load i32** %P2
|
|
ret i32* %A
|
|
; CHECK: @coerce_mustalias3
|
|
; CHECK-NOT: load
|
|
; CHECK: ret i32*
|
|
}
|
|
|
|
;; i32 -> f32 load forwarding.
|
|
define float @coerce_mustalias4(i32* %P, i1 %cond) {
|
|
%A = load i32* %P
|
|
|
|
%P2 = bitcast i32* %P to float*
|
|
%B = load float* %P2
|
|
br i1 %cond, label %T, label %F
|
|
T:
|
|
ret float %B
|
|
|
|
F:
|
|
%X = bitcast i32 %A to float
|
|
ret float %X
|
|
|
|
; CHECK: @coerce_mustalias4
|
|
; CHECK: %A = load i32* %P
|
|
; CHECK-NOT: load
|
|
; CHECK: ret float
|
|
; CHECK: F:
|
|
}
|
|
|
|
;; i32 -> i8 forwarding
|
|
define i8 @coerce_mustalias5(i32 %V, i32* %P) {
|
|
store i32 %V, i32* %P
|
|
|
|
%P2 = bitcast i32* %P to i8*
|
|
|
|
%A = load i8* %P2
|
|
ret i8 %A
|
|
; CHECK: @coerce_mustalias5
|
|
; CHECK-NOT: load
|
|
; CHECK: ret i8
|
|
}
|
|
|
|
;; i64 -> float forwarding
|
|
define float @coerce_mustalias6(i64 %V, i64* %P) {
|
|
store i64 %V, i64* %P
|
|
|
|
%P2 = bitcast i64* %P to float*
|
|
|
|
%A = load float* %P2
|
|
ret float %A
|
|
; CHECK: @coerce_mustalias6
|
|
; CHECK-NOT: load
|
|
; CHECK: ret float
|
|
}
|
|
|
|
;; i64 -> i8* (32-bit) forwarding
|
|
define i8* @coerce_mustalias7(i64 %V, i64* %P) {
|
|
store i64 %V, i64* %P
|
|
|
|
%P2 = bitcast i64* %P to i8**
|
|
|
|
%A = load i8** %P2
|
|
ret i8* %A
|
|
; CHECK: @coerce_mustalias7
|
|
; CHECK-NOT: load
|
|
; CHECK: ret i8*
|
|
}
|
|
|
|
; memset -> i16 forwarding.
|
|
define signext i16 @memset_to_i16_local(i16* %A) nounwind ssp {
|
|
entry:
|
|
%conv = bitcast i16* %A to i8*
|
|
tail call void @llvm.memset.i64(i8* %conv, i8 1, i64 200, i32 1)
|
|
%arrayidx = getelementptr inbounds i16* %A, i64 42
|
|
%tmp2 = load i16* %arrayidx
|
|
ret i16 %tmp2
|
|
; CHECK: @memset_to_i16_local
|
|
; CHECK-NOT: load
|
|
; CHECK: ret i16 257
|
|
}
|
|
|
|
; memset -> float forwarding.
|
|
define float @memset_to_float_local(float* %A, i8 %Val) nounwind ssp {
|
|
entry:
|
|
%conv = bitcast float* %A to i8* ; <i8*> [#uses=1]
|
|
tail call void @llvm.memset.i64(i8* %conv, i8 %Val, i64 400, i32 1)
|
|
%arrayidx = getelementptr inbounds float* %A, i64 42 ; <float*> [#uses=1]
|
|
%tmp2 = load float* %arrayidx ; <float> [#uses=1]
|
|
ret float %tmp2
|
|
; CHECK: @memset_to_float_local
|
|
; CHECK-NOT: load
|
|
; CHECK: zext
|
|
; CHECK-NEXT: shl
|
|
; CHECK-NEXT: or
|
|
; CHECK-NEXT: shl
|
|
; CHECK-NEXT: or
|
|
; CHECK-NEXT: bitcast
|
|
; CHECK-NEXT: ret float
|
|
}
|
|
|
|
;; non-local memset -> i16 load forwarding.
|
|
define i16 @memset_to_i16_nonlocal0(i16* %P, i1 %cond) {
|
|
%P3 = bitcast i16* %P to i8*
|
|
br i1 %cond, label %T, label %F
|
|
T:
|
|
tail call void @llvm.memset.i64(i8* %P3, i8 1, i64 400, i32 1)
|
|
br label %Cont
|
|
|
|
F:
|
|
tail call void @llvm.memset.i64(i8* %P3, i8 2, i64 400, i32 1)
|
|
br label %Cont
|
|
|
|
Cont:
|
|
%P2 = getelementptr i16* %P, i32 4
|
|
%A = load i16* %P2
|
|
ret i16 %A
|
|
|
|
; CHECK: @memset_to_i16_nonlocal0
|
|
; CHECK: Cont:
|
|
; CHECK-NEXT: %A = phi i16 [ 514, %F ], [ 257, %T ]
|
|
; CHECK-NOT: load
|
|
; CHECK: ret i16 %A
|
|
}
|
|
|
|
@GCst = constant {i32, float, i32 } { i32 42, float 14., i32 97 }
|
|
|
|
; memset -> float forwarding.
|
|
define float @memcpy_to_float_local(float* %A) nounwind ssp {
|
|
entry:
|
|
%conv = bitcast float* %A to i8* ; <i8*> [#uses=1]
|
|
tail call void @llvm.memcpy.i64(i8* %conv, i8* bitcast ({i32, float, i32 }* @GCst to i8*), i64 12, i32 1)
|
|
%arrayidx = getelementptr inbounds float* %A, i64 1 ; <float*> [#uses=1]
|
|
%tmp2 = load float* %arrayidx ; <float> [#uses=1]
|
|
ret float %tmp2
|
|
; CHECK: @memcpy_to_float_local
|
|
; CHECK-NOT: load
|
|
; CHECK: ret float 1.400000e+01
|
|
}
|
|
|
|
|
|
declare void @llvm.memset.i64(i8* nocapture, i8, i64, i32) nounwind
|
|
declare void @llvm.memcpy.i64(i8* nocapture, i8* nocapture, i64, i32) nounwind
|
|
|
|
|
|
|
|
|
|
;; non-local i32/float -> i8 load forwarding.
|
|
define i8 @coerce_mustalias_nonlocal0(i32* %P, i1 %cond) {
|
|
%P2 = bitcast i32* %P to float*
|
|
%P3 = bitcast i32* %P to i8*
|
|
br i1 %cond, label %T, label %F
|
|
T:
|
|
store i32 42, i32* %P
|
|
br label %Cont
|
|
|
|
F:
|
|
store float 1.0, float* %P2
|
|
br label %Cont
|
|
|
|
Cont:
|
|
%A = load i8* %P3
|
|
ret i8 %A
|
|
|
|
; CHECK: @coerce_mustalias_nonlocal0
|
|
; CHECK: Cont:
|
|
; CHECK: %A = phi i8 [
|
|
; CHECK-NOT: load
|
|
; CHECK: ret i8 %A
|
|
}
|
|
|
|
|
|
;; non-local i32/float -> i8 load forwarding. This also tests that the "P3"
|
|
;; bitcast equivalence can be properly phi translated.
|
|
define i8 @coerce_mustalias_nonlocal1(i32* %P, i1 %cond) {
|
|
%P2 = bitcast i32* %P to float*
|
|
br i1 %cond, label %T, label %F
|
|
T:
|
|
store i32 42, i32* %P
|
|
br label %Cont
|
|
|
|
F:
|
|
store float 1.0, float* %P2
|
|
br label %Cont
|
|
|
|
Cont:
|
|
%P3 = bitcast i32* %P to i8*
|
|
%A = load i8* %P3
|
|
ret i8 %A
|
|
|
|
;; FIXME: This is disabled because this caused a miscompile in the llvm-gcc
|
|
;; bootstrap, see r82411
|
|
;
|
|
; HECK: @coerce_mustalias_nonlocal1
|
|
; HECK: Cont:
|
|
; HECK: %A = phi i8 [
|
|
; HECK-NOT: load
|
|
; HECK: ret i8 %A
|
|
}
|
|
|
|
|
|
;; non-local i32 -> i8 partial redundancy load forwarding.
|
|
define i8 @coerce_mustalias_pre0(i32* %P, i1 %cond) {
|
|
%P3 = bitcast i32* %P to i8*
|
|
br i1 %cond, label %T, label %F
|
|
T:
|
|
store i32 42, i32* %P
|
|
br label %Cont
|
|
|
|
F:
|
|
br label %Cont
|
|
|
|
Cont:
|
|
%A = load i8* %P3
|
|
ret i8 %A
|
|
|
|
; CHECK: @coerce_mustalias_pre0
|
|
; CHECK: F:
|
|
; CHECK: load i8* %P3
|
|
; CHECK: Cont:
|
|
; CHECK: %A = phi i8 [
|
|
; CHECK-NOT: load
|
|
; CHECK: ret i8 %A
|
|
}
|
|
|
|
;;===----------------------------------------------------------------------===;;
|
|
;; Store -> Load and Load -> Load forwarding where src and dst are different
|
|
;; types, and the reload is an offset from the store pointer.
|
|
;;===----------------------------------------------------------------------===;;
|
|
|
|
;; i32 -> i8 forwarding.
|
|
;; PR4216
|
|
define i8 @coerce_offset0(i32 %V, i32* %P) {
|
|
store i32 %V, i32* %P
|
|
|
|
%P2 = bitcast i32* %P to i8*
|
|
%P3 = getelementptr i8* %P2, i32 2
|
|
|
|
%A = load i8* %P3
|
|
ret i8 %A
|
|
; CHECK: @coerce_offset0
|
|
; CHECK-NOT: load
|
|
; CHECK: ret i8
|
|
}
|
|
|
|
;; non-local i32/float -> i8 load forwarding.
|
|
define i8 @coerce_offset_nonlocal0(i32* %P, i1 %cond) {
|
|
%P2 = bitcast i32* %P to float*
|
|
%P3 = bitcast i32* %P to i8*
|
|
%P4 = getelementptr i8* %P3, i32 2
|
|
br i1 %cond, label %T, label %F
|
|
T:
|
|
store i32 42, i32* %P
|
|
br label %Cont
|
|
|
|
F:
|
|
store float 1.0, float* %P2
|
|
br label %Cont
|
|
|
|
Cont:
|
|
%A = load i8* %P4
|
|
ret i8 %A
|
|
|
|
; CHECK: @coerce_offset_nonlocal0
|
|
; CHECK: Cont:
|
|
; CHECK: %A = phi i8 [
|
|
; CHECK-NOT: load
|
|
; CHECK: ret i8 %A
|
|
}
|
|
|
|
|
|
;; non-local i32 -> i8 partial redundancy load forwarding.
|
|
define i8 @coerce_offset_pre0(i32* %P, i1 %cond) {
|
|
%P3 = bitcast i32* %P to i8*
|
|
%P4 = getelementptr i8* %P3, i32 2
|
|
br i1 %cond, label %T, label %F
|
|
T:
|
|
store i32 42, i32* %P
|
|
br label %Cont
|
|
|
|
F:
|
|
br label %Cont
|
|
|
|
Cont:
|
|
%A = load i8* %P4
|
|
ret i8 %A
|
|
|
|
; CHECK: @coerce_offset_pre0
|
|
; CHECK: F:
|
|
; CHECK: load i8* %P4
|
|
; CHECK: Cont:
|
|
; CHECK: %A = phi i8 [
|
|
; CHECK-NOT: load
|
|
; CHECK: ret i8 %A
|
|
}
|
|
|
|
define i32 @chained_load(i32** %p) {
|
|
block1:
|
|
%z = load i32** %p
|
|
br i1 true, label %block2, label %block3
|
|
|
|
block2:
|
|
%a = load i32** %p
|
|
br label %block4
|
|
|
|
block3:
|
|
%b = load i32** %p
|
|
br label %block4
|
|
|
|
block4:
|
|
%c = load i32** %p
|
|
%d = load i32* %c
|
|
ret i32 %d
|
|
|
|
; CHECK: @chained_load
|
|
; CHECK: %z = load i32** %p
|
|
; CHECK-NOT: load
|
|
; CHECK: %d = load i32* %z
|
|
; CHECK-NEXT: ret i32 %d
|
|
}
|
|
|
|
|
|
declare i1 @cond() readonly
|
|
declare i1 @cond2() readonly
|
|
|
|
define i32 @phi_trans2() {
|
|
; CHECK: @phi_trans2
|
|
entry:
|
|
%P = alloca i32, i32 400
|
|
br label %F1
|
|
|
|
F1:
|
|
%A = phi i32 [1, %entry], [2, %F]
|
|
%cond2 = call i1 @cond()
|
|
br i1 %cond2, label %T1, label %TY
|
|
|
|
T1:
|
|
%P2 = getelementptr i32* %P, i32 %A
|
|
%x = load i32* %P2
|
|
%cond = call i1 @cond2()
|
|
br i1 %cond, label %TX, label %F
|
|
|
|
F:
|
|
%P3 = getelementptr i32* %P, i32 2
|
|
store i32 17, i32* %P3
|
|
|
|
store i32 42, i32* %P2 ; Provides "P[A]".
|
|
br label %F1
|
|
|
|
TX:
|
|
; This load should not be compiled to 'ret i32 42'. An overly clever
|
|
; implementation of GVN would see that we're returning 17 if the loop
|
|
; executes once or 42 if it executes more than that, but we'd have to do
|
|
; loop restructuring to expose this, and GVN shouldn't do this sort of CFG
|
|
; transformation.
|
|
|
|
; CHECK: TX:
|
|
; CHECK: ret i32 %x
|
|
ret i32 %x
|
|
TY:
|
|
ret i32 0
|
|
}
|
|
|
|
define i32 @phi_trans3(i32* %p) {
|
|
; CHECK: @phi_trans3
|
|
block1:
|
|
br i1 true, label %block2, label %block3
|
|
|
|
block2:
|
|
store i32 87, i32* %p
|
|
br label %block4
|
|
|
|
block3:
|
|
%p2 = getelementptr i32* %p, i32 43
|
|
store i32 97, i32* %p2
|
|
br label %block4
|
|
|
|
block4:
|
|
%A = phi i32 [-1, %block2], [42, %block3]
|
|
br i1 true, label %block5, label %exit
|
|
|
|
; CHECK: block4:
|
|
; CHECK-NEXT: %D = phi i32 [ 87, %block2 ], [ 97, %block3 ]
|
|
; CHECK-NOT: load
|
|
|
|
block5:
|
|
%B = add i32 %A, 1
|
|
br i1 true, label %block6, label %exit
|
|
|
|
block6:
|
|
%C = getelementptr i32* %p, i32 %B
|
|
br i1 true, label %block7, label %exit
|
|
|
|
block7:
|
|
%D = load i32* %C
|
|
ret i32 %D
|
|
|
|
; CHECK: block7:
|
|
; CHECK-NEXT: ret i32 %D
|
|
|
|
exit:
|
|
ret i32 -1
|
|
}
|
|
|
|
define i8 @phi_trans4(i8* %p) {
|
|
; CHECK: @phi_trans4
|
|
entry:
|
|
%X3 = getelementptr i8* %p, i32 192
|
|
store i8 192, i8* %X3
|
|
|
|
%X = getelementptr i8* %p, i32 4
|
|
%Y = load i8* %X
|
|
br label %loop
|
|
|
|
loop:
|
|
%i = phi i32 [4, %entry], [192, %loop]
|
|
%X2 = getelementptr i8* %p, i32 %i
|
|
%Y2 = load i8* %X2
|
|
|
|
; CHECK: loop:
|
|
; CHECK-NEXT: %Y2 = phi i8 [ %Y, %entry ], [ 0, %loop ]
|
|
; CHECK-NOT: load i8
|
|
|
|
%cond = call i1 @cond2()
|
|
|
|
%Z = bitcast i8 *%X3 to i32*
|
|
store i32 0, i32* %Z
|
|
br i1 %cond, label %loop, label %out
|
|
|
|
out:
|
|
%R = add i8 %Y, %Y2
|
|
ret i8 %R
|
|
}
|
|
|
|
define i8 @phi_trans5(i8* %p) {
|
|
; CHECK: @phi_trans5
|
|
entry:
|
|
|
|
%X4 = getelementptr i8* %p, i32 2
|
|
store i8 19, i8* %X4
|
|
|
|
%X = getelementptr i8* %p, i32 4
|
|
%Y = load i8* %X
|
|
br label %loop
|
|
|
|
loop:
|
|
%i = phi i32 [4, %entry], [3, %cont]
|
|
%X2 = getelementptr i8* %p, i32 %i
|
|
%Y2 = load i8* %X2 ; Ensure this load is not being incorrectly replaced.
|
|
%cond = call i1 @cond2()
|
|
br i1 %cond, label %cont, label %out
|
|
|
|
cont:
|
|
%Z = getelementptr i8* %X2, i32 -1
|
|
%Z2 = bitcast i8 *%Z to i32*
|
|
store i32 50462976, i32* %Z2 ;; (1 << 8) | (2 << 16) | (3 << 24)
|
|
|
|
|
|
; CHECK: store i32
|
|
; CHECK-NEXT: getelementptr i8* %p, i32 3
|
|
; CHECK-NEXT: load i8*
|
|
br label %loop
|
|
|
|
out:
|
|
%R = add i8 %Y, %Y2
|
|
ret i8 %R
|
|
}
|
|
|
|
|
|
|