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