mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-02-07 14:33:15 +00:00
cb9cbc4949
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90697 91177308-0d34-0410-b5e6-96231b3b80d8
404 lines
8.3 KiB
LLVM
404 lines
8.3 KiB
LLVM
; RUN: opt < %s -gvn -S | FileCheck %s
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; 32-bit little endian target.
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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"
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;; Trivial RLE test.
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define i32 @test0(i32 %V, i32* %P) {
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store i32 %V, i32* %P
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%A = load i32* %P
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ret i32 %A
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; CHECK: @test0
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; CHECK: ret i32 %V
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}
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;;===----------------------------------------------------------------------===;;
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;; Tests for crashers
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;;===----------------------------------------------------------------------===;;
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;; PR5016
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define i8 @crash0({i32, i32} %A, {i32, i32}* %P) {
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store {i32, i32} %A, {i32, i32}* %P
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%X = bitcast {i32, i32}* %P to i8*
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%Y = load i8* %X
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ret i8 %Y
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}
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;;===----------------------------------------------------------------------===;;
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;; Store -> Load and Load -> Load forwarding where src and dst are different
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;; types, but where the base pointer is a must alias.
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;;===----------------------------------------------------------------------===;;
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;; i32 -> f32 forwarding.
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define float @coerce_mustalias1(i32 %V, i32* %P) {
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store i32 %V, i32* %P
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%P2 = bitcast i32* %P to float*
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%A = load float* %P2
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ret float %A
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; CHECK: @coerce_mustalias1
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; CHECK-NOT: load
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; CHECK: ret float
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}
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;; i32* -> float forwarding.
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define float @coerce_mustalias2(i32* %V, i32** %P) {
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store i32* %V, i32** %P
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%P2 = bitcast i32** %P to float*
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%A = load float* %P2
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ret float %A
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; CHECK: @coerce_mustalias2
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; CHECK-NOT: load
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; CHECK: ret float
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}
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;; float -> i32* forwarding.
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define i32* @coerce_mustalias3(float %V, float* %P) {
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store float %V, float* %P
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%P2 = bitcast float* %P to i32**
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%A = load i32** %P2
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ret i32* %A
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; CHECK: @coerce_mustalias3
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; CHECK-NOT: load
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; CHECK: ret i32*
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}
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;; i32 -> f32 load forwarding.
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define float @coerce_mustalias4(i32* %P, i1 %cond) {
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%A = load i32* %P
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%P2 = bitcast i32* %P to float*
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%B = load float* %P2
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br i1 %cond, label %T, label %F
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T:
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ret float %B
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F:
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%X = bitcast i32 %A to float
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ret float %X
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; CHECK: @coerce_mustalias4
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; CHECK: %A = load i32* %P
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; CHECK-NOT: load
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; CHECK: ret float
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; CHECK: F:
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}
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;; i32 -> i8 forwarding
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define i8 @coerce_mustalias5(i32 %V, i32* %P) {
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store i32 %V, i32* %P
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%P2 = bitcast i32* %P to i8*
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%A = load i8* %P2
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ret i8 %A
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; CHECK: @coerce_mustalias5
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; CHECK-NOT: load
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; CHECK: ret i8
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}
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;; i64 -> float forwarding
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define float @coerce_mustalias6(i64 %V, i64* %P) {
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store i64 %V, i64* %P
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%P2 = bitcast i64* %P to float*
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%A = load float* %P2
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ret float %A
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; CHECK: @coerce_mustalias6
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; CHECK-NOT: load
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; CHECK: ret float
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}
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;; i64 -> i8* (32-bit) forwarding
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define i8* @coerce_mustalias7(i64 %V, i64* %P) {
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store i64 %V, i64* %P
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%P2 = bitcast i64* %P to i8**
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%A = load i8** %P2
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ret i8* %A
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; CHECK: @coerce_mustalias7
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; CHECK-NOT: load
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; CHECK: ret i8*
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}
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; memset -> i16 forwarding.
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define signext i16 @memset_to_i16_local(i16* %A) nounwind ssp {
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entry:
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%conv = bitcast i16* %A to i8*
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tail call void @llvm.memset.i64(i8* %conv, i8 1, i64 200, i32 1)
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%arrayidx = getelementptr inbounds i16* %A, i64 42
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%tmp2 = load i16* %arrayidx
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ret i16 %tmp2
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; CHECK: @memset_to_i16_local
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; CHECK-NOT: load
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; CHECK: ret i16 257
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}
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; memset -> float forwarding.
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define float @memset_to_float_local(float* %A, i8 %Val) nounwind ssp {
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entry:
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%conv = bitcast float* %A to i8* ; <i8*> [#uses=1]
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tail call void @llvm.memset.i64(i8* %conv, i8 %Val, i64 400, i32 1)
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%arrayidx = getelementptr inbounds float* %A, i64 42 ; <float*> [#uses=1]
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%tmp2 = load float* %arrayidx ; <float> [#uses=1]
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ret float %tmp2
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; CHECK: @memset_to_float_local
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; CHECK-NOT: load
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; CHECK: zext
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; CHECK-NEXT: shl
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; CHECK-NEXT: or
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; CHECK-NEXT: shl
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; CHECK-NEXT: or
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; CHECK-NEXT: bitcast
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; CHECK-NEXT: ret float
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}
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;; non-local memset -> i16 load forwarding.
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define i16 @memset_to_i16_nonlocal0(i16* %P, i1 %cond) {
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%P3 = bitcast i16* %P to i8*
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br i1 %cond, label %T, label %F
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T:
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tail call void @llvm.memset.i64(i8* %P3, i8 1, i64 400, i32 1)
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br label %Cont
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F:
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tail call void @llvm.memset.i64(i8* %P3, i8 2, i64 400, i32 1)
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br label %Cont
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Cont:
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%P2 = getelementptr i16* %P, i32 4
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%A = load i16* %P2
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ret i16 %A
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; CHECK: @memset_to_i16_nonlocal0
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; CHECK: Cont:
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; CHECK-NEXT: %A = phi i16 [ 514, %F ], [ 257, %T ]
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; CHECK-NOT: load
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; CHECK: ret i16 %A
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}
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declare void @llvm.memset.i64(i8* nocapture, i8, i64, i32) nounwind
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;; non-local i32/float -> i8 load forwarding.
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define i8 @coerce_mustalias_nonlocal0(i32* %P, i1 %cond) {
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%P2 = bitcast i32* %P to float*
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%P3 = bitcast i32* %P to i8*
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br i1 %cond, label %T, label %F
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T:
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store i32 42, i32* %P
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br label %Cont
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F:
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store float 1.0, float* %P2
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br label %Cont
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Cont:
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%A = load i8* %P3
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ret i8 %A
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; CHECK: @coerce_mustalias_nonlocal0
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; CHECK: Cont:
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; CHECK: %A = phi i8 [
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; CHECK-NOT: load
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; CHECK: ret i8 %A
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}
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;; non-local i32/float -> i8 load forwarding. This also tests that the "P3"
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;; bitcast equivalence can be properly phi translated.
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define i8 @coerce_mustalias_nonlocal1(i32* %P, i1 %cond) {
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%P2 = bitcast i32* %P to float*
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br i1 %cond, label %T, label %F
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T:
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store i32 42, i32* %P
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br label %Cont
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F:
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store float 1.0, float* %P2
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br label %Cont
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Cont:
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%P3 = bitcast i32* %P to i8*
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%A = load i8* %P3
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ret i8 %A
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;; FIXME: This is disabled because this caused a miscompile in the llvm-gcc
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;; bootstrap, see r82411
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;
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; HECK: @coerce_mustalias_nonlocal1
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; HECK: Cont:
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; HECK: %A = phi i8 [
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; HECK-NOT: load
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; HECK: ret i8 %A
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}
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;; non-local i32 -> i8 partial redundancy load forwarding.
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define i8 @coerce_mustalias_pre0(i32* %P, i1 %cond) {
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%P3 = bitcast i32* %P to i8*
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br i1 %cond, label %T, label %F
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T:
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store i32 42, i32* %P
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br label %Cont
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F:
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br label %Cont
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Cont:
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%A = load i8* %P3
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ret i8 %A
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; CHECK: @coerce_mustalias_pre0
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; CHECK: F:
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; CHECK: load i8* %P3
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; CHECK: Cont:
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; CHECK: %A = phi i8 [
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; CHECK-NOT: load
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; CHECK: ret i8 %A
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}
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;;===----------------------------------------------------------------------===;;
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;; Store -> Load and Load -> Load forwarding where src and dst are different
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;; types, and the reload is an offset from the store pointer.
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;;===----------------------------------------------------------------------===;;
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;; i32 -> i8 forwarding.
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;; PR4216
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define i8 @coerce_offset0(i32 %V, i32* %P) {
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store i32 %V, i32* %P
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%P2 = bitcast i32* %P to i8*
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%P3 = getelementptr i8* %P2, i32 2
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%A = load i8* %P3
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ret i8 %A
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; CHECK: @coerce_offset0
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; CHECK-NOT: load
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; CHECK: ret i8
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}
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;; non-local i32/float -> i8 load forwarding.
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define i8 @coerce_offset_nonlocal0(i32* %P, i1 %cond) {
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%P2 = bitcast i32* %P to float*
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%P3 = bitcast i32* %P to i8*
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%P4 = getelementptr i8* %P3, i32 2
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br i1 %cond, label %T, label %F
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T:
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store i32 42, i32* %P
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br label %Cont
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F:
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store float 1.0, float* %P2
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br label %Cont
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Cont:
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%A = load i8* %P4
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ret i8 %A
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; CHECK: @coerce_offset_nonlocal0
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; CHECK: Cont:
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; CHECK: %A = phi i8 [
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; CHECK-NOT: load
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; CHECK: ret i8 %A
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}
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;; non-local i32 -> i8 partial redundancy load forwarding.
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define i8 @coerce_offset_pre0(i32* %P, i1 %cond) {
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%P3 = bitcast i32* %P to i8*
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%P4 = getelementptr i8* %P3, i32 2
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br i1 %cond, label %T, label %F
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T:
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store i32 42, i32* %P
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br label %Cont
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F:
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br label %Cont
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Cont:
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%A = load i8* %P4
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ret i8 %A
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; CHECK: @coerce_offset_pre0
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; CHECK: F:
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; CHECK: load i8* %P4
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; CHECK: Cont:
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; CHECK: %A = phi i8 [
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; CHECK-NOT: load
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; CHECK: ret i8 %A
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}
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define i32 @chained_load(i32** %p) {
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block1:
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%z = load i32** %p
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br i1 true, label %block2, label %block3
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block2:
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%a = load i32** %p
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br label %block4
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block3:
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%b = load i32** %p
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br label %block4
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block4:
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%c = load i32** %p
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%d = load i32* %c
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ret i32 %d
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; CHECK: @chained_load
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; CHECK: %z = load i32** %p
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; CHECK-NOT: load
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; CHECK: %d = load i32* %z
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; CHECK-NEXT: ret i32 %d
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}
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declare i1 @cond() readonly
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declare i1 @cond2() readonly
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define i32 @phi_trans2() {
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entry:
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%P = alloca i32, i32 400
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br label %F1
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F1:
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%A = phi i32 [1, %entry], [2, %F]
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%cond2 = call i1 @cond()
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br i1 %cond2, label %T1, label %TY
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T1:
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%P2 = getelementptr i32* %P, i32 %A
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%x = load i32* %P2
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%cond = call i1 @cond2()
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br i1 %cond, label %TX, label %F
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F:
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%P3 = getelementptr i32* %P, i32 2
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store i32 17, i32* %P3
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store i32 42, i32* %P2 ; Provides "P[A]".
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br label %F1
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TX:
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ret i32 %x ;; SHOULD NOT BE COMPILED TO 'ret i32 42'.
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TY:
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ret i32 0
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}
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