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| ; RUN: opt -S -codegenprepare < %s | FileCheck %s
target datalayout =
"e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
target triple = "x86_64-unknown-linux-gnu"
@x = external global [1 x [2 x <4 x float>]]
; Can we sink single addressing mode computation to use?
define void @test1(i1 %cond, i64* %base) {
; CHECK-LABEL: @test1
; CHECK: getelementptr inbounds i8, {{.+}} 40
entry:
%addr = getelementptr inbounds i64, i64* %base, i64 5
%casted = bitcast i64* %addr to i32*
br i1 %cond, label %if.then, label %fallthrough
if.then:
%v = load i32, i32* %casted, align 4
br label %fallthrough
fallthrough:
ret void
}
declare void @foo(i32)
; Make sure sinking two copies of addressing mode into different blocks works
define void @test2(i1 %cond, i64* %base) {
; CHECK-LABEL: @test2
entry:
%addr = getelementptr inbounds i64, i64* %base, i64 5
%casted = bitcast i64* %addr to i32*
br i1 %cond, label %if.then, label %fallthrough
if.then:
; CHECK-LABEL: if.then:
; CHECK: getelementptr inbounds i8, {{.+}} 40
%v1 = load i32, i32* %casted, align 4
call void @foo(i32 %v1)
%cmp = icmp eq i32 %v1, 0
br i1 %cmp, label %next, label %fallthrough
next:
; CHECK-LABEL: next:
; CHECK: getelementptr inbounds i8, {{.+}} 40
%v2 = load i32, i32* %casted, align 4
call void @foo(i32 %v2)
br label %fallthrough
fallthrough:
ret void
}
; If we have two loads in the same block, only need one copy of addressing mode
; - instruction selection will duplicate if needed
define void @test3(i1 %cond, i64* %base) {
; CHECK-LABEL: @test3
entry:
%addr = getelementptr inbounds i64, i64* %base, i64 5
%casted = bitcast i64* %addr to i32*
br i1 %cond, label %if.then, label %fallthrough
if.then:
; CHECK-LABEL: if.then:
; CHECK: getelementptr inbounds i8, {{.+}} 40
%v1 = load i32, i32* %casted, align 4
call void @foo(i32 %v1)
; CHECK-NOT: getelementptr inbounds i8, {{.+}} 40
%v2 = load i32, i32* %casted, align 4
call void @foo(i32 %v2)
br label %fallthrough
fallthrough:
ret void
}
; Can we still sink addressing mode if there's a cold use of the
; address itself?
define void @test4(i1 %cond, i64* %base) {
; CHECK-LABEL: @test4
entry:
%addr = getelementptr inbounds i64, i64* %base, i64 5
%casted = bitcast i64* %addr to i32*
br i1 %cond, label %if.then, label %fallthrough
if.then:
; CHECK-LABEL: if.then:
; CHECK: getelementptr inbounds i8, {{.+}} 40
%v1 = load i32, i32* %casted, align 4
call void @foo(i32 %v1)
%cmp = icmp eq i32 %v1, 0
br i1 %cmp, label %rare.1, label %fallthrough
fallthrough:
ret void
rare.1:
; CHECK-LABEL: rare.1:
; CHECK: getelementptr inbounds i8, {{.+}} 40
call void @slowpath(i32 %v1, i32* %casted) cold
br label %fallthrough
}
; Negative test - don't want to duplicate addressing into hot path
define void @test5(i1 %cond, i64* %base) {
; CHECK-LABEL: @test5
entry:
; CHECK: %addr = getelementptr inbounds
%addr = getelementptr inbounds i64, i64* %base, i64 5
%casted = bitcast i64* %addr to i32*
br i1 %cond, label %if.then, label %fallthrough
if.then:
; CHECK-LABEL: if.then:
; CHECK-NOT: getelementptr inbounds i8, {{.+}} 40
%v1 = load i32, i32* %casted, align 4
call void @foo(i32 %v1)
%cmp = icmp eq i32 %v1, 0
br i1 %cmp, label %rare.1, label %fallthrough
fallthrough:
ret void
rare.1:
call void @slowpath(i32 %v1, i32* %casted) ;; NOT COLD
br label %fallthrough
}
; Negative test - opt for size
define void @test6(i1 %cond, i64* %base) minsize {
; CHECK-LABEL: @test6
entry:
; CHECK: %addr = getelementptr
%addr = getelementptr inbounds i64, i64* %base, i64 5
%casted = bitcast i64* %addr to i32*
br i1 %cond, label %if.then, label %fallthrough
if.then:
; CHECK-LABEL: if.then:
; CHECK-NOT: getelementptr inbounds i8, {{.+}} 40
%v1 = load i32, i32* %casted, align 4
call void @foo(i32 %v1)
%cmp = icmp eq i32 %v1, 0
br i1 %cmp, label %rare.1, label %fallthrough
fallthrough:
ret void
rare.1:
call void @slowpath(i32 %v1, i32* %casted) cold
br label %fallthrough
}
; Make sure sinking two copies of addressing mode into different blocks works
; when there are cold paths for each.
define void @test7(i1 %cond, i64* %base) {
; CHECK-LABEL: @test7
entry:
%addr = getelementptr inbounds i64, i64* %base, i64 5
%casted = bitcast i64* %addr to i32*
br i1 %cond, label %if.then, label %fallthrough
if.then:
; CHECK-LABEL: if.then:
; CHECK: getelementptr inbounds i8, {{.+}} 40
%v1 = load i32, i32* %casted, align 4
call void @foo(i32 %v1)
%cmp = icmp eq i32 %v1, 0
br i1 %cmp, label %rare.1, label %next
next:
; CHECK-LABEL: next:
; CHECK: getelementptr inbounds i8, {{.+}} 40
%v2 = load i32, i32* %casted, align 4
call void @foo(i32 %v2)
%cmp2 = icmp eq i32 %v2, 0
br i1 %cmp2, label %rare.1, label %fallthrough
fallthrough:
ret void
rare.1:
; CHECK-LABEL: rare.1:
; CHECK: getelementptr inbounds i8, {{.+}} 40
call void @slowpath(i32 %v1, i32* %casted) cold
br label %next
rare.2:
; CHECK-LABEL: rare.2:
; CHECK: getelementptr inbounds i8, {{.+}} 40
call void @slowpath(i32 %v2, i32* %casted) cold
br label %fallthrough
}
declare void @slowpath(i32, i32*)
; Make sure we don't end up in an infinite loop after we fail to sink.
; CHECK-LABEL: define void @test8
; CHECK: %ptr = getelementptr i8, i8* %aFOO_load_ptr2int_2void, i32 undef
define void @test8() {
allocas:
%aFOO_load = load float*, float** undef
%aFOO_load_ptr2int = ptrtoint float* %aFOO_load to i64
%aFOO_load_ptr2int_broadcast_init = insertelement <4 x i64> undef, i64 %aFOO_load_ptr2int, i32 0
%aFOO_load_ptr2int_2void = inttoptr i64 %aFOO_load_ptr2int to i8*
%ptr = getelementptr i8, i8* %aFOO_load_ptr2int_2void, i32 undef
br label %load.i145
load.i145:
%ptr.i143 = bitcast i8* %ptr to <4 x float>*
%valall.i144 = load <4 x float>, <4 x float>* %ptr.i143, align 4
%x_offset = getelementptr [1 x [2 x <4 x float>]], [1 x [2 x <4 x float>]]* @x, i32 0, i64 0
br label %pl_loop.i.i122
pl_loop.i.i122:
br label %pl_loop.i.i122
}
; Make sure we can sink address computation even
; if there is a cycle in phi nodes.
define void @test9(i1 %cond, i64* %base) {
; CHECK-LABEL: @test9
entry:
%addr = getelementptr inbounds i64, i64* %base, i64 5
%casted = bitcast i64* %addr to i32*
br label %header
header:
%iv = phi i32 [0, %entry], [%iv.inc, %backedge]
%casted.loop = phi i32* [%casted, %entry], [%casted.merged, %backedge]
br i1 %cond, label %if.then, label %backedge
if.then:
call void @foo(i32 %iv)
%addr.1 = getelementptr inbounds i64, i64* %base, i64 5
%casted.1 = bitcast i64* %addr.1 to i32*
br label %backedge
backedge:
; CHECK-LABEL: backedge:
; CHECK: getelementptr inbounds i8, {{.+}} 40
%casted.merged = phi i32* [%casted.loop, %header], [%casted.1, %if.then]
%v = load i32, i32* %casted.merged, align 4
call void @foo(i32 %v)
%iv.inc = add i32 %iv, 1
%cmp = icmp slt i32 %iv.inc, 1000
br i1 %cmp, label %header, label %exit
exit:
ret void
}
; Make sure we can eliminate a select when both arguments perform equivalent
; address computation.
define void @test10(i1 %cond, i64* %base) {
; CHECK-LABEL: @test10
; CHECK: getelementptr inbounds i8, {{.+}} 40
; CHECK-NOT: select
entry:
%gep1 = getelementptr inbounds i64, i64* %base, i64 5
%gep1.casted = bitcast i64* %gep1 to i32*
%base.casted = bitcast i64* %base to i32*
%gep2 = getelementptr inbounds i32, i32* %base.casted, i64 10
%casted.merged = select i1 %cond, i32* %gep1.casted, i32* %gep2
%v = load i32, i32* %casted.merged, align 4
call void @foo(i32 %v)
ret void
}
; Found by fuzzer, getSExtValue of > 64 bit constant
define void @i96_mul(i1* %base, i96 %offset) {
BB:
;; RHS = 0x7FFFFFFFFFFFFFFFFFFFFFFF
%B84 = mul i96 %offset, 39614081257132168796771975167
%G23 = getelementptr i1, i1* %base, i96 %B84
store i1 false, i1* %G23
ret void
}
|