[InstCombine] Fold IntToPtr and PtrToInt into preceding loads.

[oota-llvm.git] / test / Transforms / InstCombine / malloc-free-delete.ll

diff --git a/test/Transforms/InstCombine/malloc-free-delete.ll b/test/Transforms/InstCombine/malloc-free-delete.ll
index 4e3217dc2d9676fb56b7c108f5cc7c42b8a071b1..dc04adb06966eeb623f8e551b17effd4614fc35b 100644 (file)
--- a/test/Transforms/InstCombine/malloc-free-delete.ll
+++ b/test/Transforms/InstCombine/malloc-free-delete.ll
@@ -1,11 +1,11 @@
 ; RUN: opt < %s -instcombine -S | FileCheck %s
 ; PR1201
 define i32 @main(i32 %argc, i8** %argv) {
-; CHECK: @main
+; CHECK-LABEL: @main(
     %c_19 = alloca i8*
-    %malloc_206 = tail call i8* @malloc(i32 mul (i32 ptrtoint (i8* getelementptr (i8* null, i32 1) to i32), i32 10))
+    %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** %c_19
+    %tmp_207 = load i8*, i8** %c_19
     tail call void @free(i8* %tmp_207)
     ret i32 0
 ; CHECK-NEXT: ret i32 0
@@ -16,7 +16,7 @@ declare noalias i8* @malloc(i32)
 declare void @free(i8*)
 
 define i1 @foo() {
-; CHECK: @foo
+; CHECK-LABEL: @foo(
 ; CHECK-NEXT: ret i1 false
   %m = call i8* @malloc(i32 1)
   %z = icmp eq i8* %m, null
@@ -32,7 +32,7 @@ declare void @llvm.memmove.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i32,
 declare void @llvm.memset.p0i8.i32(i8*, i8, i32, i32, i1) nounwind
 
 define void @test3(i8* %src) {
-; CHECK: @test3
+; CHECK-LABEL: @test3(
 ; CHECK-NEXT: ret void
   %a = call noalias i8* @malloc(i32 10)
   call void @llvm.lifetime.start(i64 10, i8* %a)
@@ -49,7 +49,7 @@ define void @test3(i8* %src) {
 
 ;; This used to crash.
 define void @test4() {
-; CHECK: @test4
+; CHECK-LABEL: @test4(
 ; CHECK-NEXT: ret void
   %A = call i8* @malloc(i32 16000)
   %B = bitcast i8* %A to double*
@@ -58,7 +58,7 @@ define void @test4() {
   ret void
 }
 
-; CHECK: @test5
+; CHECK-LABEL: @test5(
 define void @test5(i8* %ptr, i8** %esc) {
 ; CHECK-NEXT: call i8* @malloc
 ; CHECK-NEXT: call i8* @malloc
@@ -91,3 +91,98 @@ define void @test5(i8* %ptr, i8** %esc) {
   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() {
+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 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) 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
+}