forked from OSchip/llvm-project
200 lines
6.4 KiB
LLVM
200 lines
6.4 KiB
LLVM
; RUN: opt < %s -instcombine -S | FileCheck %s
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; PR1201
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define i32 @main(i32 %argc, i8** %argv) {
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; CHECK-LABEL: @main(
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%c_19 = alloca i8*
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%malloc_206 = tail call i8* @malloc(i32 mul (i32 ptrtoint (i8* getelementptr (i8, i8* null, i32 1) to i32), i32 10))
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store i8* %malloc_206, i8** %c_19
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%tmp_207 = load i8*, i8** %c_19
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tail call void @free(i8* %tmp_207)
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ret i32 0
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; CHECK-NEXT: ret i32 0
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}
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declare noalias i8* @calloc(i32, i32) nounwind
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declare noalias i8* @malloc(i32)
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declare void @free(i8*)
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define i1 @foo() {
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; CHECK-LABEL: @foo(
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; CHECK-NEXT: ret i1 false
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%m = call i8* @malloc(i32 1)
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%z = icmp eq i8* %m, null
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call void @free(i8* %m)
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ret i1 %z
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}
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declare void @llvm.lifetime.start(i64, i8*)
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declare void @llvm.lifetime.end(i64, i8*)
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declare i64 @llvm.objectsize.i64(i8*, i1)
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declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i32, i1) nounwind
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declare void @llvm.memmove.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i32, i1) nounwind
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declare void @llvm.memset.p0i8.i32(i8*, i8, i32, i32, i1) nounwind
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define void @test3(i8* %src) {
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; CHECK-LABEL: @test3(
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; CHECK-NEXT: ret void
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%a = call noalias i8* @malloc(i32 10)
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call void @llvm.lifetime.start(i64 10, i8* %a)
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call void @llvm.lifetime.end(i64 10, i8* %a)
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%size = call i64 @llvm.objectsize.i64(i8* %a, i1 true)
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store i8 42, i8* %a
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call void @llvm.memcpy.p0i8.p0i8.i32(i8* %a, i8* %src, i32 32, i32 1, i1 false)
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call void @llvm.memmove.p0i8.p0i8.i32(i8* %a, i8* %src, i32 32, i32 1, i1 false)
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call void @llvm.memset.p0i8.i32(i8* %a, i8 5, i32 32, i32 1, i1 false)
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%alloc2 = call noalias i8* @calloc(i32 5, i32 7) nounwind
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%z = icmp ne i8* %alloc2, null
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ret void
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}
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;; This used to crash.
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define void @test4() {
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; CHECK-LABEL: @test4(
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; CHECK-NEXT: ret void
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%A = call i8* @malloc(i32 16000)
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%B = bitcast i8* %A to double*
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%C = bitcast double* %B to i8*
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call void @free(i8* %C)
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ret void
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}
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; CHECK-LABEL: @test5(
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define void @test5(i8* %ptr, i8** %esc) {
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; CHECK-NEXT: call i8* @malloc
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; CHECK-NEXT: call i8* @malloc
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; CHECK-NEXT: call i8* @malloc
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; CHECK-NEXT: call i8* @malloc
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; CHECK-NEXT: call i8* @malloc
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; CHECK-NEXT: call i8* @malloc
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; CHECK-NEXT: call i8* @malloc
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; CHECK-NEXT: call void @llvm.memcpy
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; CHECK-NEXT: call void @llvm.memmove
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; CHECK-NEXT: store
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; CHECK-NEXT: call void @llvm.memcpy
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; CHECK-NEXT: call void @llvm.memmove
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; CHECK-NEXT: call void @llvm.memset
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; CHECK-NEXT: store volatile
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; CHECK-NEXT: ret
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%a = call i8* @malloc(i32 700)
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%b = call i8* @malloc(i32 700)
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%c = call i8* @malloc(i32 700)
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%d = call i8* @malloc(i32 700)
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%e = call i8* @malloc(i32 700)
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%f = call i8* @malloc(i32 700)
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%g = call i8* @malloc(i32 700)
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call void @llvm.memcpy.p0i8.p0i8.i32(i8* %ptr, i8* %a, i32 32, i32 1, i1 false)
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call void @llvm.memmove.p0i8.p0i8.i32(i8* %ptr, i8* %b, i32 32, i32 1, i1 false)
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store i8* %c, i8** %esc
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call void @llvm.memcpy.p0i8.p0i8.i32(i8* %d, i8* %ptr, i32 32, i32 1, i1 true)
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call void @llvm.memmove.p0i8.p0i8.i32(i8* %e, i8* %ptr, i32 32, i32 1, i1 true)
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call void @llvm.memset.p0i8.i32(i8* %f, i8 5, i32 32, i32 1, i1 true)
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store volatile i8 4, i8* %g
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ret void
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}
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;; When a basic block contains only a call to free and this block is accessed
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;; through a test of the argument of free against null, move the call in the
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;; predecessor block.
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;; Using simplifycfg will remove the empty basic block and the branch operation
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;; Then, performing a dead elimination will remove the comparison.
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;; This is what happens with -O1 and upper.
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; CHECK-LABEL: @test6(
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define void @test6(i8* %foo) minsize {
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; CHECK: %tobool = icmp eq i8* %foo, null
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;; Call to free moved
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; CHECK-NEXT: tail call void @free(i8* %foo)
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; CHECK-NEXT: br i1 %tobool, label %if.end, label %if.then
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; CHECK: if.then:
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;; Block is now empty and may be simplified by simplifycfg
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; CHECK-NEXT: br label %if.end
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; CHECK: if.end:
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; CHECK-NEXT: ret void
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entry:
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%tobool = icmp eq i8* %foo, null
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br i1 %tobool, label %if.end, label %if.then
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if.then: ; preds = %entry
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tail call void @free(i8* %foo)
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br label %if.end
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if.end: ; preds = %entry, %if.then
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ret void
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}
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declare i8* @_ZnwmRKSt9nothrow_t(i64, i8*) nobuiltin
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declare void @_ZdlPvRKSt9nothrow_t(i8*, i8*) nobuiltin
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declare i32 @__gxx_personality_v0(...)
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declare void @_ZN1AC2Ev(i8* %this)
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; CHECK-LABEL: @test7(
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define void @test7() personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
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entry:
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%nt = alloca i8
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; CHECK-NOT: call {{.*}}@_ZnwmRKSt9nothrow_t(
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%call.i = tail call i8* @_ZnwmRKSt9nothrow_t(i64 1, i8* %nt) builtin nounwind
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invoke void @_ZN1AC2Ev(i8* undef)
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to label %.noexc.i unwind label %lpad.i
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.noexc.i: ; preds = %entry
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unreachable
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lpad.i: ; preds = %entry
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%0 = landingpad { i8*, i32 } cleanup
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; CHECK-NOT: call {{.*}}@_ZdlPvRKSt9nothrow_t(
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call void @_ZdlPvRKSt9nothrow_t(i8* %call.i, i8* %nt) builtin nounwind
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resume { i8*, i32 } %0
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}
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declare i8* @_Znwm(i64) nobuiltin
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declare i8* @_Znwj(i32) nobuiltin
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declare i8* @_Znam(i64) nobuiltin
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declare i8* @_Znaj(i32) nobuiltin
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declare void @_ZdlPv(i8*) nobuiltin
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declare void @_ZdaPv(i8*) nobuiltin
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define linkonce void @_ZdlPvm(i8* %p, i64) nobuiltin {
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call void @_ZdlPv(i8* %p)
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ret void
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}
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define linkonce void @_ZdlPvj(i8* %p, i32) nobuiltin {
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call void @_ZdlPv(i8* %p)
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ret void
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}
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define linkonce void @_ZdaPvm(i8* %p, i64) nobuiltin {
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call void @_ZdaPv(i8* %p)
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ret void
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}
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define linkonce void @_ZdaPvj(i8* %p, i32) nobuiltin {
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call void @_ZdaPv(i8* %p)
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ret void
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}
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; CHECK-LABEL: @test8(
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define void @test8() {
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; CHECK-NOT: call
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%nw = call i8* @_Znwm(i64 32) builtin
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call void @_ZdlPv(i8* %nw) builtin
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%na = call i8* @_Znam(i64 32) builtin
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call void @_ZdaPv(i8* %na) builtin
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%nwm = call i8* @_Znwm(i64 32) builtin
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call void @_ZdlPvm(i8* %nwm, i64 32) builtin
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%nwj = call i8* @_Znwj(i32 32) builtin
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call void @_ZdlPvj(i8* %nwj, i32 32) builtin
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%nam = call i8* @_Znam(i64 32) builtin
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call void @_ZdaPvm(i8* %nam, i64 32) builtin
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%naj = call i8* @_Znaj(i32 32) builtin
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call void @_ZdaPvj(i8* %naj, i32 32) builtin
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ret void
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}
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declare noalias i8* @"\01??2@YAPEAX_K@Z"(i64) nobuiltin
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declare void @"\01??3@YAXPEAX@Z"(i8*) nobuiltin
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; CHECK-LABEL: @test9(
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define void @test9() {
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; CHECK-NOT: call
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%new_long_long = call noalias i8* @"\01??2@YAPEAX_K@Z"(i64 32) builtin
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call void @"\01??3@YAXPEAX@Z"(i8* %new_long_long) builtin
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ret void
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}
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