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