mirror of
https://github.com/c64scene-ar/llvm-6502.git
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dd34dc99fd
When determining if two different loads are from the same base address, this patch allows one load to use a t2LDRi8 address mode and another to use a t2LDRi12 address mode. The current implementation is very conservative and this allows the case of differing Thumb2 byte loads to be considered. Allowing these differing modes instead of forcing the exact same opcode is useful for situations where one opcodes loads from a base address+1 and a second opcode loads for a base address-1. Patch by Daniel Stewart. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188385 91177308-0d34-0410-b5e6-96231b3b80d8
65 lines
2.7 KiB
LLVM
65 lines
2.7 KiB
LLVM
; RUN: llc < %s -march=thumb -mattr=+v7,+thumb2 | FileCheck %s
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define i8 @f1(i8* %call1, i8* %call3, i32 %h, i32 %w, i32 %Width) {
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; CHECK: f1:
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entry:
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%mul17 = mul nsw i32 %Width, %h
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%add = add nsw i32 %mul17, %w
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%sub19 = sub i32 %add, %Width
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%sub20 = add i32 %sub19, -1
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%arrayidx21 = getelementptr inbounds i8* %call1, i32 %sub20
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%0 = load i8* %arrayidx21, align 1
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%conv22 = zext i8 %0 to i32
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%arrayidx25 = getelementptr inbounds i8* %call1, i32 %sub19
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%1 = load i8* %arrayidx25, align 1
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%conv26 = zext i8 %1 to i32
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%mul23189 = add i32 %conv26, %conv22
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%add30 = add i32 %sub19, 1
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%arrayidx31 = getelementptr inbounds i8* %call1, i32 %add30
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%2 = load i8* %arrayidx31, align 1
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%conv32 = zext i8 %2 to i32
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; CHECK: ldrb r{{[0-9]*}}, [r{{[0-9]*}}, #-1]
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; CHECK-NEXT: ldrb r{{[0-9]*}}, [r{{[0-9]*}}, #1]
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%add28190 = add i32 %mul23189, %conv32
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%sub35 = add i32 %add, -1
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%arrayidx36 = getelementptr inbounds i8* %call1, i32 %sub35
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%3 = load i8* %arrayidx36, align 1
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%conv37 = zext i8 %3 to i32
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%add34191 = add i32 %add28190, %conv37
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%arrayidx40 = getelementptr inbounds i8* %call1, i32 %add
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%4 = load i8* %arrayidx40, align 1
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%conv41 = zext i8 %4 to i32
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%mul42 = mul nsw i32 %conv41, 255
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%add44 = add i32 %add, 1
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%arrayidx45 = getelementptr inbounds i8* %call1, i32 %add44
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%5 = load i8* %arrayidx45, align 1
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%conv46 = zext i8 %5 to i32
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; CHECK: ldrb r{{[0-9]*}}, [r{{[0-9]*}}, #-1]
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; CHECK-NEXT: ldrb r{{[0-9]*}}, [r{{[0-9]*}}, #1]
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%add49 = add i32 %add, %Width
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%sub50 = add i32 %add49, -1
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%arrayidx51 = getelementptr inbounds i8* %call1, i32 %sub50
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%6 = load i8* %arrayidx51, align 1
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%conv52 = zext i8 %6 to i32
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%arrayidx56 = getelementptr inbounds i8* %call1, i32 %add49
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%7 = load i8* %arrayidx56, align 1
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%conv57 = zext i8 %7 to i32
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%add61 = add i32 %add49, 1
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%arrayidx62 = getelementptr inbounds i8* %call1, i32 %add61
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%8 = load i8* %arrayidx62, align 1
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%conv63 = zext i8 %8 to i32
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; CHECK: ldrb r{{[0-9]*}}, [r{{[0-9]*}}, #-1]
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; CHECK-NEXT: ldrb{{[.w]*}} r{{[0-9]*}}, [r{{[0-9]*}}, #1]
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%tmp = add i32 %add34191, %conv46
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%tmp193 = add i32 %tmp, %conv52
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%tmp194 = add i32 %tmp193, %conv57
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%tmp195 = add i32 %tmp194, %conv63
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%tmp196 = mul i32 %tmp195, -28
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%add65 = add i32 %tmp196, %mul42
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%9 = lshr i32 %add65, 8
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%conv68 = trunc i32 %9 to i8
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%arrayidx69 = getelementptr inbounds i8* %call3, i32 %add
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store i8 %conv68, i8* %arrayidx69, align 1
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ret i8 %conv68
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}
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