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https://github.com/c64scene-ar/llvm-6502.git
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59 lines
2.1 KiB
LLVM
59 lines
2.1 KiB
LLVM
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; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep getelementptr | grep {, i64}
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; Instcombine should promote the getelementptr index up to the target's
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; pointer size, making the conversion explicit, which helps expose it to
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; other optimizations.
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
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target triple = "x86_64-apple-darwin8"
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define i64 @test(i64* %first, i32 %count) nounwind {
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entry:
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%first_addr = alloca i64* ; <i64**> [#uses=2]
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%count_addr = alloca i32 ; <i32*> [#uses=2]
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%retval = alloca i64 ; <i64*> [#uses=2]
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%n = alloca i32 ; <i32*> [#uses=5]
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%result = alloca i64 ; <i64*> [#uses=4]
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%0 = alloca i64 ; <i64*> [#uses=2]
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%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
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store i64* %first, i64** %first_addr
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store i32 %count, i32* %count_addr
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store i64 0, i64* %result, align 8
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store i32 0, i32* %n, align 4
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br label %bb1
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bb: ; preds = %bb1
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%1 = load i64** %first_addr, align 8 ; <i64*> [#uses=1]
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%2 = load i32* %n, align 4 ; <i32> [#uses=1]
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%3 = bitcast i32 %2 to i32 ; <i64> [#uses=1]
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%4 = getelementptr i64* %1, i32 %3 ; <i64*> [#uses=1]
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%5 = load i64* %4, align 8 ; <i64> [#uses=1]
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%6 = lshr i64 %5, 4 ; <i64> [#uses=1]
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%7 = load i64* %result, align 8 ; <i64> [#uses=1]
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%8 = add i64 %6, %7 ; <i64> [#uses=1]
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store i64 %8, i64* %result, align 8
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%9 = load i32* %n, align 4 ; <i32> [#uses=1]
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%10 = add i32 %9, 1 ; <i32> [#uses=1]
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store i32 %10, i32* %n, align 4
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br label %bb1
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bb1: ; preds = %bb, %entry
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%11 = load i32* %n, align 4 ; <i32> [#uses=1]
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%12 = load i32* %count_addr, align 4 ; <i32> [#uses=1]
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%13 = icmp slt i32 %11, %12 ; <i1> [#uses=1]
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%14 = zext i1 %13 to i8 ; <i8> [#uses=1]
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%toBool = icmp ne i8 %14, 0 ; <i1> [#uses=1]
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br i1 %toBool, label %bb, label %bb2
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bb2: ; preds = %bb1
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%15 = load i64* %result, align 8 ; <i64> [#uses=1]
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store i64 %15, i64* %0, align 8
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%16 = load i64* %0, align 8 ; <i64> [#uses=1]
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store i64 %16, i64* %retval, align 8
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br label %return
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return: ; preds = %bb2
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%retval3 = load i64* %retval ; <i64> [#uses=1]
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ret i64 %retval3
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}
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