mirror of
https://github.com/c64scene-ar/llvm-6502.git
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3e883734fa
and allow some optimizations to turn conditional branches into unconditional. This commit adds a simple control-flow optimization which merges two consecutive basic blocks which are connected by a single edge. This allows the codegen to operate on larger basic blocks. rdar://11973998 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161852 91177308-0d34-0410-b5e6-96231b3b80d8
65 lines
3.9 KiB
LLVM
65 lines
3.9 KiB
LLVM
; RUN: llc < %s -march=x86 | FileCheck %s
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target triple = "i686-pc-linux-gnu"
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@str = internal constant [9 x i8] c"%f+%f*i\0A\00" ; <[9 x i8]*> [#uses=1]
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define i32 @main() {
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; CHECK: main:
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; CHECK-NOT: ret
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; CHECK: subl $4, %{{.*}}
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; CHECK: ret
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entry:
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%retval = alloca i32, align 4 ; <i32*> [#uses=1]
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%tmp = alloca { double, double }, align 16 ; <{ double, double }*> [#uses=4]
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%tmp1 = alloca { double, double }, align 16 ; <{ double, double }*> [#uses=4]
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%tmp2 = alloca { double, double }, align 16 ; <{ double, double }*> [#uses=3]
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%pi = alloca double, align 8 ; <double*> [#uses=2]
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%z = alloca { double, double }, align 16 ; <{ double, double }*> [#uses=4]
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%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
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store double 0x400921FB54442D18, double* %pi
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%tmp.upgrd.1 = load double* %pi ; <double> [#uses=1]
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%real = getelementptr { double, double }* %tmp1, i64 0, i32 0 ; <double*> [#uses=1]
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store double 0.000000e+00, double* %real
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%real3 = getelementptr { double, double }* %tmp1, i64 0, i32 1 ; <double*> [#uses=1]
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store double %tmp.upgrd.1, double* %real3
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%tmp.upgrd.2 = getelementptr { double, double }* %tmp, i64 0, i32 0 ; <double*> [#uses=1]
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%tmp4 = getelementptr { double, double }* %tmp1, i64 0, i32 0 ; <double*> [#uses=1]
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%tmp5 = load double* %tmp4 ; <double> [#uses=1]
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store double %tmp5, double* %tmp.upgrd.2
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%tmp6 = getelementptr { double, double }* %tmp, i64 0, i32 1 ; <double*> [#uses=1]
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%tmp7 = getelementptr { double, double }* %tmp1, i64 0, i32 1 ; <double*> [#uses=1]
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%tmp8 = load double* %tmp7 ; <double> [#uses=1]
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store double %tmp8, double* %tmp6
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%tmp.upgrd.3 = bitcast { double, double }* %tmp to { i64, i64 }* ; <{ i64, i64 }*> [#uses=1]
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%tmp.upgrd.4 = getelementptr { i64, i64 }* %tmp.upgrd.3, i64 0, i32 0 ; <i64*> [#uses=1]
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%tmp.upgrd.5 = load i64* %tmp.upgrd.4 ; <i64> [#uses=1]
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%tmp9 = bitcast { double, double }* %tmp to { i64, i64 }* ; <{ i64, i64 }*> [#uses=1]
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%tmp10 = getelementptr { i64, i64 }* %tmp9, i64 0, i32 1 ; <i64*> [#uses=1]
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%tmp11 = load i64* %tmp10 ; <i64> [#uses=1]
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call void @cexp( { double, double }* sret %tmp2, i64 %tmp.upgrd.5, i64 %tmp11 )
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%tmp12 = getelementptr { double, double }* %z, i64 0, i32 0 ; <double*> [#uses=1]
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%tmp13 = getelementptr { double, double }* %tmp2, i64 0, i32 0 ; <double*> [#uses=1]
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%tmp14 = load double* %tmp13 ; <double> [#uses=1]
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store double %tmp14, double* %tmp12
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%tmp15 = getelementptr { double, double }* %z, i64 0, i32 1 ; <double*> [#uses=1]
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%tmp16 = getelementptr { double, double }* %tmp2, i64 0, i32 1 ; <double*> [#uses=1]
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%tmp17 = load double* %tmp16 ; <double> [#uses=1]
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store double %tmp17, double* %tmp15
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%tmp18 = getelementptr { double, double }* %z, i64 0, i32 1 ; <double*> [#uses=1]
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%tmp19 = load double* %tmp18 ; <double> [#uses=1]
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%tmp20 = getelementptr { double, double }* %z, i64 0, i32 0 ; <double*> [#uses=1]
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%tmp21 = load double* %tmp20 ; <double> [#uses=1]
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%tmp.upgrd.6 = getelementptr [9 x i8]* @str, i32 0, i64 0 ; <i8*> [#uses=1]
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%tmp.upgrd.7 = call i32 (i8*, ...)* @printf( i8* %tmp.upgrd.6, double %tmp21, double %tmp19 ) ; <i32> [#uses=0]
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br label %finish
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finish:
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%retval.upgrd.8 = load i32* %retval ; <i32> [#uses=1]
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ret i32 %retval.upgrd.8
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}
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declare void @cexp({ double, double }* sret , i64, i64)
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declare i32 @printf(i8*, ...)
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