mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-15 04:30:12 +00:00
e3357863aa
occurs because instcombine sinks loads and inserts phis. This kicks in on such apps as 175.vpr, eon, 403.gcc, xalancbmk and a bunch of times in spec2006 in some app that uses std::deque. This resolves the last of rdar://7339113. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124090 91177308-0d34-0410-b5e6-96231b3b80d8
154 lines
4.1 KiB
LLVM
154 lines
4.1 KiB
LLVM
; RUN: opt %s -scalarrepl -S | FileCheck %s
|
|
; Test promotion of allocas that have phis and select users.
|
|
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-n8:16:32:64"
|
|
target triple = "x86_64-apple-darwin10.2"
|
|
|
|
%struct.X = type { i32 }
|
|
%PairTy = type {i32, i32}
|
|
|
|
; CHECK: @test1
|
|
; CHECK: %a.0 = alloca i32
|
|
; CHECK: %b.0 = alloca i32
|
|
define i32 @test1(i32 %x) nounwind readnone ssp {
|
|
entry:
|
|
%a = alloca %struct.X, align 8 ; <%struct.X*> [#uses=2]
|
|
%b = alloca %struct.X, align 8 ; <%struct.X*> [#uses=2]
|
|
%0 = getelementptr inbounds %struct.X* %a, i64 0, i32 0 ; <i32*> [#uses=1]
|
|
store i32 1, i32* %0, align 8
|
|
%1 = getelementptr inbounds %struct.X* %b, i64 0, i32 0 ; <i32*> [#uses=1]
|
|
store i32 2, i32* %1, align 8
|
|
%2 = icmp eq i32 %x, 0 ; <i1> [#uses=1]
|
|
%p.0 = select i1 %2, %struct.X* %b, %struct.X* %a ; <%struct.X*> [#uses=1]
|
|
%3 = getelementptr inbounds %struct.X* %p.0, i64 0, i32 0 ; <i32*> [#uses=1]
|
|
%4 = load i32* %3, align 8 ; <i32> [#uses=1]
|
|
ret i32 %4
|
|
}
|
|
|
|
; CHECK: @test2
|
|
; CHECK: %X.ld = phi i32 [ 1, %entry ], [ 2, %T ]
|
|
; CHECK-NEXT: ret i32 %X.ld
|
|
define i32 @test2(i1 %c) {
|
|
entry:
|
|
%A = alloca {i32, i32}
|
|
%B = getelementptr {i32, i32}* %A, i32 0, i32 0
|
|
store i32 1, i32* %B
|
|
br i1 %c, label %T, label %F
|
|
T:
|
|
%C = getelementptr {i32, i32}* %A, i32 0, i32 1
|
|
store i32 2, i32* %C
|
|
br label %F
|
|
F:
|
|
%X = phi i32* [%B, %entry], [%C, %T]
|
|
%Q = load i32* %X
|
|
ret i32 %Q
|
|
}
|
|
|
|
; CHECK: @test3
|
|
; CHECK-NEXT: %Q = select i1 %c, i32 1, i32 2
|
|
; CHECK-NEXT: ret i32 %Q
|
|
; rdar://8904039
|
|
define i32 @test3(i1 %c) {
|
|
%A = alloca {i32, i32}
|
|
%B = getelementptr {i32, i32}* %A, i32 0, i32 0
|
|
store i32 1, i32* %B
|
|
%C = getelementptr {i32, i32}* %A, i32 0, i32 1
|
|
store i32 2, i32* %C
|
|
|
|
%X = select i1 %c, i32* %B, i32* %C
|
|
%Q = load i32* %X
|
|
ret i32 %Q
|
|
}
|
|
|
|
;; We can't scalarize this, a use of the select is not an element access.
|
|
define i64 @test4(i1 %c) {
|
|
entry:
|
|
%A = alloca %PairTy
|
|
; CHECK: @test4
|
|
; CHECK: %A = alloca %PairTy
|
|
%B = getelementptr {i32, i32}* %A, i32 0, i32 0
|
|
store i32 1, i32* %B
|
|
%C = getelementptr {i32, i32}* %A, i32 0, i32 1
|
|
store i32 2, i32* %B
|
|
|
|
%X = select i1 %c, i32* %B, i32* %C
|
|
%Y = bitcast i32* %X to i64*
|
|
%Q = load i64* %Y
|
|
ret i64 %Q
|
|
}
|
|
|
|
|
|
;;
|
|
;; Tests for promoting allocas used by selects.
|
|
;; rdar://7339113
|
|
;;
|
|
|
|
define i32 @test5(i32 *%P) nounwind readnone ssp {
|
|
entry:
|
|
%b = alloca i32, align 8
|
|
store i32 2, i32* %b, align 8
|
|
|
|
;; Select on constant condition should be folded.
|
|
%p.0 = select i1 false, i32* %b, i32* %P
|
|
store i32 123, i32* %p.0
|
|
|
|
%r = load i32* %b, align 8
|
|
ret i32 %r
|
|
|
|
; CHECK: @test5
|
|
; CHECK: store i32 123, i32* %P
|
|
; CHECK: ret i32 2
|
|
}
|
|
|
|
define i32 @test6(i32 %x, i1 %c) nounwind readnone ssp {
|
|
%a = alloca i32, align 8
|
|
%b = alloca i32, align 8
|
|
store i32 1, i32* %a, align 8
|
|
store i32 2, i32* %b, align 8
|
|
%p.0 = select i1 %c, i32* %b, i32* %a
|
|
%r = load i32* %p.0, align 8
|
|
ret i32 %r
|
|
; CHECK: @test6
|
|
; CHECK-NEXT: %r = select i1 %c, i32 2, i32 1
|
|
; CHECK-NEXT: ret i32 %r
|
|
}
|
|
|
|
; Verify that the loads happen where the loads are, not where the select is.
|
|
define i32 @test7(i32 %x, i1 %c) nounwind readnone ssp {
|
|
%a = alloca i32, align 8
|
|
%b = alloca i32, align 8
|
|
store i32 1, i32* %a
|
|
store i32 2, i32* %b
|
|
%p.0 = select i1 %c, i32* %b, i32* %a
|
|
|
|
store i32 0, i32* %a
|
|
|
|
%r = load i32* %p.0, align 8
|
|
ret i32 %r
|
|
; CHECK: @test7
|
|
; CHECK-NOT: alloca i32
|
|
; CHECK: %r = select i1 %c, i32 2, i32 0
|
|
; CHECK: ret i32 %r
|
|
}
|
|
|
|
;; Promote allocs that are PHI'd together by moving the loads.
|
|
define i32 @test8(i32 %x) nounwind readnone ssp {
|
|
; CHECK: @test8
|
|
; CHECK-NOT: load i32
|
|
; CHECK-NOT: store i32
|
|
; CHECK: %p.0.ld = phi i32 [ 2, %entry ], [ 1, %T ]
|
|
; CHECK-NEXT: ret i32 %p.0.ld
|
|
entry:
|
|
%a = alloca i32, align 8
|
|
%b = alloca i32, align 8
|
|
store i32 1, i32* %a, align 8
|
|
store i32 2, i32* %b, align 8
|
|
%c = icmp eq i32 %x, 0
|
|
br i1 %c, label %T, label %Cont
|
|
T:
|
|
br label %Cont
|
|
Cont:
|
|
%p.0 = phi i32* [%b, %entry],[%a, %T]
|
|
%r = load i32* %p.0, align 8
|
|
ret i32 %r
|
|
}
|