mirror of
https://github.com/c64scene-ar/llvm-6502.git
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88 lines
3.0 KiB
LLVM
88 lines
3.0 KiB
LLVM
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; RUN: opt -instcombine -S < %s | FileCheck %s
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declare void @llvm.init.trampoline(i8*, i8*, i8*)
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declare i8* @llvm.adjust.trampoline(i8*)
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declare i32 @f(i8 * nest, i32)
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; Most common case
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define i32 @test0(i32 %n) {
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%alloca = alloca [10 x i8], align 16
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%gep = getelementptr [10 x i8]* %alloca, i32 0, i32 0
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call void @llvm.init.trampoline(i8* %gep, i8* bitcast (i32 (i8*, i32)* @f to i8*),
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i8* null)
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%tramp = call i8* @llvm.adjust.trampoline(i8* %gep)
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%function = bitcast i8* %tramp to i32(i32)*
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%ret = call i32 %function(i32 %n)
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ret i32 %ret
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; CHECK: define i32 @test0(i32 %n) {
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; CHECK: %ret = call i32 @f(i8* nest null, i32 %n)
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}
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define i32 @test1(i32 %n, i8* %trampmem) {
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call void @llvm.init.trampoline(i8* %trampmem,
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i8* bitcast (i32 (i8*, i32)* @f to i8*),
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i8* null)
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%tramp = call i8* @llvm.adjust.trampoline(i8* %trampmem)
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%function = bitcast i8* %tramp to i32(i32)*
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%ret = call i32 %function(i32 %n)
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ret i32 %ret
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; CHECK: define i32 @test1(i32 %n, i8* %trampmem) {
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; CHECK: %ret = call i32 @f(i8* nest null, i32 %n)
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}
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define i32 @test2(i32 %n, i8* %trampmem) {
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%tramp = call i8* @llvm.adjust.trampoline(i8* %trampmem)
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%functiona = bitcast i8* %tramp to i32(i32)*
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%ret = call i32 %functiona(i32 %n)
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ret i32 %ret
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; CHECK: define i32 @test2(i32 %n, i8* %trampmem) {
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; CHECK: %ret = call i32 %functiona(i32 %n)
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}
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define i32 @test3(i32 %n, i8* %trampmem) {
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call void @llvm.init.trampoline(i8* %trampmem,
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i8* bitcast (i32 (i8*, i32)* @f to i8*),
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i8* null)
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; CHECK: define i32 @test3(i32 %n, i8* %trampmem) {
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; CHECK: %ret0 = call i32 @f(i8* nest null, i32 %n)
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%tramp0 = call i8* @llvm.adjust.trampoline(i8* %trampmem)
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%function0 = bitcast i8* %tramp0 to i32(i32)*
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%ret0 = call i32 %function0(i32 %n)
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;; Not optimized since previous call could be writing.
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%tramp1 = call i8* @llvm.adjust.trampoline(i8* %trampmem)
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%function1 = bitcast i8* %tramp1 to i32(i32)*
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%ret1 = call i32 %function1(i32 %n)
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; CHECK: %ret1 = call i32 %function1(i32 %n)
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ret i32 %ret1
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}
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define i32 @test4(i32 %n) {
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%alloca = alloca [10 x i8], align 16
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%gep = getelementptr [10 x i8]* %alloca, i32 0, i32 0
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call void @llvm.init.trampoline(i8* %gep, i8* bitcast (i32 (i8*, i32)* @f to i8*),
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i8* null)
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%tramp0 = call i8* @llvm.adjust.trampoline(i8* %gep)
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%function0 = bitcast i8* %tramp0 to i32(i32)*
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%ret0 = call i32 %function0(i32 %n)
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%tramp1 = call i8* @llvm.adjust.trampoline(i8* %gep)
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%function1 = bitcast i8* %tramp0 to i32(i32)*
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%ret1 = call i32 %function1(i32 %n)
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%tramp2 = call i8* @llvm.adjust.trampoline(i8* %gep)
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%function2 = bitcast i8* %tramp2 to i32(i32)*
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%ret2 = call i32 %function2(i32 %n)
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ret i32 %ret2
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; CHECK: define i32 @test4(i32 %n) {
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; CHECK: %ret0 = call i32 @f(i8* nest null, i32 %n)
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; CHECK: %ret1 = call i32 @f(i8* nest null, i32 %n)
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; CHECK: %ret2 = call i32 @f(i8* nest null, i32 %n)
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}
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