@@ -1,14 +1,16 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instcombine -S | FileCheck %s
; PR1201
define i32 @main (i32 %argc , i8** %argv ) {
; 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
; CHECK-NEXT: ret i32 0
;
%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
}
declare noalias i8* @calloc (i32 , i32 ) nounwind
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@@ -17,7 +19,8 @@ declare void @free(i8*)
define i1 @foo () {
; CHECK-LABEL: @foo(
; CHECK-NEXT: ret i1 false
; CHECK-NEXT: ret i1 false
;
%m = call i8* @malloc (i32 1 )
%z = icmp eq i8* %m , null
call void @free (i8* %m )
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@@ -33,7 +36,8 @@ declare void @llvm.memset.p0i8.i32(i8*, i8, i32, i1) nounwind
define void @test3 (i8* %src ) {
; CHECK-LABEL: @test3(
; CHECK-NEXT: ret void
; CHECK-NEXT: ret void
;
%a = call noalias i8* @malloc (i32 10 )
call void @llvm.lifetime.start.p0i8 (i64 10 , i8* %a )
call void @llvm.lifetime.end.p0i8 (i64 10 , i8* %a )
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@@ -50,31 +54,33 @@ define void @test3(i8* %src) {
;; This used to crash.
define void @test4 () {
; CHECK-LABEL: @test4(
; CHECK-NEXT: ret void
; 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
; CHECK-LABEL: @test5(
; CHECK-NEXT: [[A:%.*]] = call dereferenceable_or_null(700) i8* @malloc(i32 700)
; CHECK-NEXT: [[B:%.*]] = call dereferenceable_or_null(700) i8* @malloc(i32 700)
; CHECK-NEXT: [[C:%.*]] = call dereferenceable_or_null(700) i8* @malloc(i32 700)
; CHECK-NEXT: [[D:%.*]] = call dereferenceable_or_null(700) i8* @malloc(i32 700)
; CHECK-NEXT: [[E:%.*]] = call dereferenceable_or_null(700) i8* @malloc(i32 700)
; CHECK-NEXT: [[F:%.*]] = call dereferenceable_or_null(700) i8* @malloc(i32 700)
; CHECK-NEXT: [[G:%.*]] = call dereferenceable_or_null(700) i8* @malloc(i32 700)
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 1 dereferenceable(32) [[PTR:%.*]], i8* align 1 dereferenceable(32) [[A]], i32 32, i1 false)
; CHECK-NEXT: call void @llvm.memmove.p0i8.p0i8.i32(i8* align 1 dereferenceable(32) [[PTR]], i8* align 1 dereferenceable(32) [[B]], i32 32, i1 false)
; CHECK-NEXT: store i8* [[C]], i8** [[ESC:%.*]], align 8
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* [[D]], i8* [[PTR]], i32 32, i1 true)
; CHECK-NEXT: call void @llvm.memmove.p0i8.p0i8.i32(i8* [[E]], i8* [[PTR]], i32 32, i1 true)
; CHECK-NEXT: call void @llvm.memset.p0i8.i32(i8* [[F]], i8 5, i32 32, i1 true)
; CHECK-NEXT: store volatile i8 4, i8* [[G]], align 1
; CHECK-NEXT: ret void
;
%a = call i8* @malloc (i32 700 )
%b = call i8* @malloc (i32 700 )
%c = call i8* @malloc (i32 700 )
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@@ -98,17 +104,19 @@ define void @test5(i8* %ptr, i8** %esc) {
;; 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
; CHECK-LABEL: @test6(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TOBOOL:%.*]] = icmp eq i8* [[FOO:%.*]], null
; CHECK-NEXT: tail call void @free(i8* [[FOO]])
; CHECK-NEXT: br i1 [[TOBOOL]], label [[IF_END:%.*]], label [[IF_THEN:%.*]]
; CHECK: if.then:
; CHECK-NEXT: br label [[IF_END]]
; CHECK: if.end:
; CHECK-NEXT: ret void
;
;; 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
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@@ -126,27 +134,40 @@ 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* ) {
; CHECK-LABEL: @test7(
; CHECK-NEXT: entry:
; CHECK-NEXT: invoke void @_ZN1AC2Ev(i8* undef)
; CHECK-NEXT: to label [[DOTNOEXC_I:%.*]] unwind label [[LPAD_I:%.*]]
; CHECK: .noexc.i:
; CHECK-NEXT: unreachable
; CHECK: lpad.i:
; CHECK-NEXT: [[TMP0:%.*]] = landingpad { i8*, i32 }
; CHECK-NEXT: cleanup
; CHECK-NEXT: resume { i8*, i32 } [[TMP0]]
;
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
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
define i8* @_Znwj (i32 %n ) nobuiltin {
; CHECK-LABEL: @_Znwj(
; CHECK-NEXT: [[Z:%.*]] = zext i32 [[N:%.*]] to i64
; CHECK-NEXT: [[M:%.*]] = call i8* @_Znwm(i64 [[Z]])
; CHECK-NEXT: ret i8* [[M]]
;
%z = zext i32 %n to i64
%m = call i8* @_Znwm (i64 %z )
ret i8* %m
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@@ -157,18 +178,34 @@ declare void @_ZdlPv(i8*) nobuiltin
declare void @_ZdaPv (i8* ) nobuiltin
define linkonce void @_ZdlPvm (i8* %p , i64 ) nobuiltin {
; CHECK-LABEL: @_ZdlPvm(
; CHECK-NEXT: call void @_ZdlPv(i8* [[P:%.*]])
; CHECK-NEXT: ret void
;
call void @_ZdlPv (i8* %p )
ret void
}
define linkonce void @_ZdlPvj (i8* %p , i32 ) nobuiltin {
; CHECK-LABEL: @_ZdlPvj(
; CHECK-NEXT: call void @_ZdlPv(i8* [[P:%.*]])
; CHECK-NEXT: ret void
;
call void @_ZdlPv (i8* %p )
ret void
}
define linkonce void @_ZdaPvm (i8* %p , i64 ) nobuiltin {
; CHECK-LABEL: @_ZdaPvm(
; CHECK-NEXT: call void @_ZdaPv(i8* [[P:%.*]])
; CHECK-NEXT: ret void
;
call void @_ZdaPv (i8* %p )
ret void
}
define linkonce void @_ZdaPvj (i8* %p , i32 ) nobuiltin {
; CHECK-LABEL: @_ZdaPvj(
; CHECK-NEXT: call void @_ZdaPv(i8* [[P:%.*]])
; CHECK-NEXT: ret void
;
call void @_ZdaPv (i8* %p )
ret void
}
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@@ -196,9 +233,10 @@ declare void @_ZdlPvSt11align_val_tRKSt9nothrow_t(i8*, i64, i8*) nobuiltin
declare void @_ZdaPvSt11align_val_tRKSt9nothrow_t (i8* , i64 , i8* ) nobuiltin
; CHECK-LABEL: @test8(
define void @test8 () {
; CHECK-NOT: call
; CHECK-LABEL: @test8(
; CHECK-NEXT: ret void
;
%nt = alloca i8
%nw = call i8* @_Znwm (i64 32 ) builtin
call void @_ZdlPv (i8* %nw ) builtin
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@@ -234,45 +272,52 @@ define void @test8() {
declare noalias i8* @"\01 ??2@YAPEAX_K@Z" (i64 ) nobuiltin
declare void @"\01 ??3@YAXPEAX@Z" (i8* ) nobuiltin
; CHECK-LABEL: @test9(
define void @test9 () {
; CHECK-NOT: call
; CHECK-LABEL: @test9(
; CHECK-NEXT: ret void
;
%new_long_long = call noalias i8* @"\01 ??2@YAPEAX_K@Z" (i64 32 ) builtin
call void @"\01 ??3@YAXPEAX@Z" (i8* %new_long_long ) builtin
ret void
}
define void @test10 () {
; CHECK-LABEL: @test10
; CHECK: call void @_ZdlPv
; CHECK-LABEL: @test10(
; CHECK-NEXT: call void @_ZdlPv(i8* null)
; CHECK-NEXT: ret void
;
call void @_ZdlPv (i8* null )
ret void
}
define void @test11 () {
; CHECK-LABEL: @test11
; CHECK: call i8* @_Znwm
; CHECK: call void @_ZdlPv
; CHECK-LABEL: @test11(
; CHECK-NEXT: [[CALL:%.*]] = call dereferenceable_or_null(8) i8* @_Znwm(i64 8) #5
; CHECK-NEXT: call void @_ZdlPv(i8* [[CALL]])
; CHECK-NEXT: ret void
;
%call = call i8* @_Znwm (i64 8 ) builtin
call void @_ZdlPv (i8* %call )
ret void
}
;; Check that the optimization that moves a call to free in its predecessor
;; block (see test6) also happens when noop casts are involved.
; CHECK-LABEL: @test12(
define void @test12 (i32* %foo ) minsize {
; CHECK: %tobool = icmp eq i32* %foo, null
; CHECK-LABEL: @test12(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TOBOOL:%.*]] = icmp eq i32* [[FOO:%.*]], null
; CHECK-NEXT: [[BITCAST:%.*]] = bitcast i32* [[FOO]] to i8*
; CHECK-NEXT: tail call void @free(i8* [[BITCAST]])
; CHECK-NEXT: br i1 [[TOBOOL]], label [[IF_END:%.*]], label [[IF_THEN:%.*]]
; CHECK: if.then:
; CHECK-NEXT: br label [[IF_END]]
; CHECK: if.end:
; CHECK-NEXT: ret void
;
;; Everything before the call to free should have been moved as well.
; CHECK-NEXT: %bitcast = bitcast i32* %foo to i8*
;; Call to free moved
; CHECK-NEXT: tail call void @free(i8* %bitcast)
; 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 i32* %foo , null
br i1 %tobool , label %if.end , label %if.then
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