mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-15 20:29:48 +00:00
39f4e8d9cc
This update was done with the following bash script:
find test/Transforms -name "*.ll" | \
while read NAME; do
echo "$NAME"
if ! grep -q "^; *RUN: *llc" $NAME; then
TEMP=`mktemp -t temp`
cp $NAME $TEMP
sed -n "s/^define [^@]*@\([A-Za-z0-9_]*\)(.*$/\1/p" < $NAME | \
while read FUNC; do
sed -i '' "s/;\(.*\)\([A-Za-z0-9_]*\):\( *\)@$FUNC\([( ]*\)\$/;\1\2-LABEL:\3@$FUNC(/g" $TEMP
done
mv $TEMP $NAME
fi
done
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186268 91177308-0d34-0410-b5e6-96231b3b80d8
633 lines
15 KiB
LLVM
633 lines
15 KiB
LLVM
; This test makes sure that these instructions are properly eliminated.
|
|
;
|
|
; RUN: opt < %s -instcombine -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:n8:16:32:64"
|
|
|
|
define i32 @test1(i32 %A, i1 %b) {
|
|
BB0:
|
|
br i1 %b, label %BB1, label %BB2
|
|
|
|
BB1:
|
|
; Combine away one argument PHI nodes
|
|
%B = phi i32 [ %A, %BB0 ]
|
|
ret i32 %B
|
|
|
|
BB2:
|
|
ret i32 %A
|
|
; CHECK-LABEL: @test1(
|
|
; CHECK: BB1:
|
|
; CHECK-NEXT: ret i32 %A
|
|
}
|
|
|
|
define i32 @test2(i32 %A, i1 %b) {
|
|
BB0:
|
|
br i1 %b, label %BB1, label %BB2
|
|
|
|
BB1:
|
|
br label %BB2
|
|
|
|
BB2:
|
|
; Combine away PHI nodes with same values
|
|
%B = phi i32 [ %A, %BB0 ], [ %A, %BB1 ]
|
|
ret i32 %B
|
|
; CHECK-LABEL: @test2(
|
|
; CHECK: BB2:
|
|
; CHECK-NEXT: ret i32 %A
|
|
}
|
|
|
|
define i32 @test3(i32 %A, i1 %b) {
|
|
BB0:
|
|
br label %Loop
|
|
|
|
Loop:
|
|
; PHI has same value always.
|
|
%B = phi i32 [ %A, %BB0 ], [ %B, %Loop ]
|
|
br i1 %b, label %Loop, label %Exit
|
|
|
|
Exit:
|
|
ret i32 %B
|
|
; CHECK-LABEL: @test3(
|
|
; CHECK: Exit:
|
|
; CHECK-NEXT: ret i32 %A
|
|
}
|
|
|
|
define i32 @test4(i1 %b) {
|
|
BB0:
|
|
; Loop is unreachable
|
|
ret i32 7
|
|
|
|
Loop: ; preds = %L2, %Loop
|
|
; PHI has same value always.
|
|
%B = phi i32 [ %B, %L2 ], [ %B, %Loop ]
|
|
br i1 %b, label %L2, label %Loop
|
|
|
|
L2: ; preds = %Loop
|
|
br label %Loop
|
|
; CHECK-LABEL: @test4(
|
|
; CHECK: Loop:
|
|
; CHECK-NEXT: br i1 %b
|
|
}
|
|
|
|
define i32 @test5(i32 %A, i1 %b) {
|
|
BB0:
|
|
br label %Loop
|
|
|
|
Loop: ; preds = %Loop, %BB0
|
|
; PHI has same value always.
|
|
%B = phi i32 [ %A, %BB0 ], [ undef, %Loop ]
|
|
br i1 %b, label %Loop, label %Exit
|
|
|
|
Exit: ; preds = %Loop
|
|
ret i32 %B
|
|
; CHECK-LABEL: @test5(
|
|
; CHECK: Loop:
|
|
; CHECK-NEXT: br i1 %b
|
|
; CHECK: Exit:
|
|
; CHECK-NEXT: ret i32 %A
|
|
}
|
|
|
|
define i32 @test6(i16 %A, i1 %b) {
|
|
BB0:
|
|
%X = zext i16 %A to i32
|
|
br i1 %b, label %BB1, label %BB2
|
|
|
|
BB1:
|
|
%Y = zext i16 %A to i32
|
|
br label %BB2
|
|
|
|
BB2:
|
|
;; Suck casts into phi
|
|
%B = phi i32 [ %X, %BB0 ], [ %Y, %BB1 ]
|
|
ret i32 %B
|
|
; CHECK-LABEL: @test6(
|
|
; CHECK: BB2:
|
|
; CHECK: zext i16 %A to i32
|
|
; CHECK-NEXT: ret i32
|
|
}
|
|
|
|
define i32 @test7(i32 %A, i1 %b) {
|
|
BB0:
|
|
br label %Loop
|
|
|
|
Loop: ; preds = %Loop, %BB0
|
|
; PHI is dead.
|
|
%B = phi i32 [ %A, %BB0 ], [ %C, %Loop ]
|
|
%C = add i32 %B, 123
|
|
br i1 %b, label %Loop, label %Exit
|
|
|
|
Exit: ; preds = %Loop
|
|
ret i32 0
|
|
; CHECK-LABEL: @test7(
|
|
; CHECK: Loop:
|
|
; CHECK-NEXT: br i1 %b
|
|
}
|
|
|
|
define i32* @test8({ i32, i32 } *%A, i1 %b) {
|
|
BB0:
|
|
%X = getelementptr inbounds { i32, i32 } *%A, i32 0, i32 1
|
|
br i1 %b, label %BB1, label %BB2
|
|
|
|
BB1:
|
|
%Y = getelementptr { i32, i32 } *%A, i32 0, i32 1
|
|
br label %BB2
|
|
|
|
BB2:
|
|
;; Suck GEPs into phi
|
|
%B = phi i32* [ %X, %BB0 ], [ %Y, %BB1 ]
|
|
ret i32* %B
|
|
; CHECK-LABEL: @test8(
|
|
; CHECK-NOT: phi
|
|
; CHECK: BB2:
|
|
; CHECK-NEXT: %B = getelementptr { i32, i32 }* %A
|
|
; CHECK-NEXT: ret i32* %B
|
|
}
|
|
|
|
define i32 @test9(i32* %A, i32* %B) {
|
|
entry:
|
|
%c = icmp eq i32* %A, null
|
|
br i1 %c, label %bb1, label %bb
|
|
|
|
bb:
|
|
%C = load i32* %B, align 1
|
|
br label %bb2
|
|
|
|
bb1:
|
|
%D = load i32* %A, align 1
|
|
br label %bb2
|
|
|
|
bb2:
|
|
%E = phi i32 [ %C, %bb ], [ %D, %bb1 ]
|
|
ret i32 %E
|
|
; CHECK-LABEL: @test9(
|
|
; CHECK: bb2:
|
|
; CHECK-NEXT: phi i32* [ %B, %bb ], [ %A, %bb1 ]
|
|
; CHECK-NEXT: %E = load i32* %{{[^,]*}}, align 1
|
|
; CHECK-NEXT: ret i32 %E
|
|
|
|
}
|
|
|
|
define i32 @test10(i32* %A, i32* %B) {
|
|
entry:
|
|
%c = icmp eq i32* %A, null
|
|
br i1 %c, label %bb1, label %bb
|
|
|
|
bb:
|
|
%C = load i32* %B, align 16
|
|
br label %bb2
|
|
|
|
bb1:
|
|
%D = load i32* %A, align 32
|
|
br label %bb2
|
|
|
|
bb2:
|
|
%E = phi i32 [ %C, %bb ], [ %D, %bb1 ]
|
|
ret i32 %E
|
|
; CHECK-LABEL: @test10(
|
|
; CHECK: bb2:
|
|
; CHECK-NEXT: phi i32* [ %B, %bb ], [ %A, %bb1 ]
|
|
; CHECK-NEXT: %E = load i32* %{{[^,]*}}, align 16
|
|
; CHECK-NEXT: ret i32 %E
|
|
}
|
|
|
|
|
|
; PR1777
|
|
declare i1 @test11a()
|
|
|
|
define i1 @test11() {
|
|
entry:
|
|
%a = alloca i32
|
|
%i = ptrtoint i32* %a to i64
|
|
%b = call i1 @test11a()
|
|
br i1 %b, label %one, label %two
|
|
|
|
one:
|
|
%x = phi i64 [%i, %entry], [%y, %two]
|
|
%c = call i1 @test11a()
|
|
br i1 %c, label %two, label %end
|
|
|
|
two:
|
|
%y = phi i64 [%i, %entry], [%x, %one]
|
|
%d = call i1 @test11a()
|
|
br i1 %d, label %one, label %end
|
|
|
|
end:
|
|
%f = phi i64 [ %x, %one], [%y, %two]
|
|
; Change the %f to %i, and the optimizer suddenly becomes a lot smarter
|
|
; even though %f must equal %i at this point
|
|
%g = inttoptr i64 %f to i32*
|
|
store i32 10, i32* %g
|
|
%z = call i1 @test11a()
|
|
ret i1 %z
|
|
; CHECK-LABEL: @test11(
|
|
; CHECK-NOT: phi i32
|
|
; CHECK: ret i1 %z
|
|
}
|
|
|
|
|
|
define i64 @test12(i1 %cond, i8* %Ptr, i64 %Val) {
|
|
entry:
|
|
%tmp41 = ptrtoint i8* %Ptr to i64
|
|
%tmp42 = zext i64 %tmp41 to i128
|
|
br i1 %cond, label %end, label %two
|
|
|
|
two:
|
|
%tmp36 = zext i64 %Val to i128 ; <i128> [#uses=1]
|
|
%tmp37 = shl i128 %tmp36, 64 ; <i128> [#uses=1]
|
|
%ins39 = or i128 %tmp42, %tmp37 ; <i128> [#uses=1]
|
|
br label %end
|
|
|
|
end:
|
|
%tmp869.0 = phi i128 [ %tmp42, %entry ], [ %ins39, %two ]
|
|
%tmp32 = trunc i128 %tmp869.0 to i64 ; <i64> [#uses=1]
|
|
%tmp29 = lshr i128 %tmp869.0, 64 ; <i128> [#uses=1]
|
|
%tmp30 = trunc i128 %tmp29 to i64 ; <i64> [#uses=1]
|
|
|
|
%tmp2 = add i64 %tmp32, %tmp30
|
|
ret i64 %tmp2
|
|
; CHECK-LABEL: @test12(
|
|
; CHECK-NOT: zext
|
|
; CHECK: end:
|
|
; CHECK-NEXT: phi i64 [ 0, %entry ], [ %Val, %two ]
|
|
; CHECK-NOT: phi
|
|
; CHECK: ret i64
|
|
}
|
|
|
|
declare void @test13f(double, i32)
|
|
|
|
define void @test13(i1 %cond, i32 %V1, double %Vald) {
|
|
entry:
|
|
%tmp42 = zext i32 %V1 to i128
|
|
br i1 %cond, label %end, label %two
|
|
|
|
two:
|
|
%Val = bitcast double %Vald to i64
|
|
%tmp36 = zext i64 %Val to i128 ; <i128> [#uses=1]
|
|
%tmp37 = shl i128 %tmp36, 64 ; <i128> [#uses=1]
|
|
%ins39 = or i128 %tmp42, %tmp37 ; <i128> [#uses=1]
|
|
br label %end
|
|
|
|
end:
|
|
%tmp869.0 = phi i128 [ %tmp42, %entry ], [ %ins39, %two ]
|
|
%tmp32 = trunc i128 %tmp869.0 to i32
|
|
%tmp29 = lshr i128 %tmp869.0, 64 ; <i128> [#uses=1]
|
|
%tmp30 = trunc i128 %tmp29 to i64 ; <i64> [#uses=1]
|
|
%tmp31 = bitcast i64 %tmp30 to double
|
|
|
|
call void @test13f(double %tmp31, i32 %tmp32)
|
|
ret void
|
|
; CHECK-LABEL: @test13(
|
|
; CHECK-NOT: zext
|
|
; CHECK: end:
|
|
; CHECK-NEXT: phi double [ 0.000000e+00, %entry ], [ %Vald, %two ]
|
|
; CHECK-NEXT: call void @test13f(double {{[^,]*}}, i32 %V1)
|
|
; CHECK: ret void
|
|
}
|
|
|
|
define i640 @test14a(i320 %A, i320 %B, i1 %b1) {
|
|
BB0:
|
|
%a = zext i320 %A to i640
|
|
%b = zext i320 %B to i640
|
|
br label %Loop
|
|
|
|
Loop:
|
|
%C = phi i640 [ %a, %BB0 ], [ %b, %Loop ]
|
|
br i1 %b1, label %Loop, label %Exit
|
|
|
|
Exit: ; preds = %Loop
|
|
ret i640 %C
|
|
; CHECK-LABEL: @test14a(
|
|
; CHECK: Loop:
|
|
; CHECK-NEXT: phi i320
|
|
}
|
|
|
|
define i160 @test14b(i320 %A, i320 %B, i1 %b1) {
|
|
BB0:
|
|
%a = trunc i320 %A to i160
|
|
%b = trunc i320 %B to i160
|
|
br label %Loop
|
|
|
|
Loop:
|
|
%C = phi i160 [ %a, %BB0 ], [ %b, %Loop ]
|
|
br i1 %b1, label %Loop, label %Exit
|
|
|
|
Exit: ; preds = %Loop
|
|
ret i160 %C
|
|
; CHECK-LABEL: @test14b(
|
|
; CHECK: Loop:
|
|
; CHECK-NEXT: phi i160
|
|
}
|
|
|
|
declare i64 @test15a(i64)
|
|
|
|
define i64 @test15b(i64 %A, i1 %b) {
|
|
; CHECK-LABEL: @test15b(
|
|
entry:
|
|
%i0 = zext i64 %A to i128
|
|
%i1 = shl i128 %i0, 64
|
|
%i = or i128 %i1, %i0
|
|
br i1 %b, label %one, label %two
|
|
; CHECK: entry:
|
|
; CHECK-NEXT: br i1 %b
|
|
|
|
one:
|
|
%x = phi i128 [%i, %entry], [%y, %two]
|
|
%x1 = lshr i128 %x, 64
|
|
%x2 = trunc i128 %x1 to i64
|
|
%c = call i64 @test15a(i64 %x2)
|
|
%c1 = zext i64 %c to i128
|
|
br label %two
|
|
|
|
; CHECK: one:
|
|
; CHECK-NEXT: phi i64
|
|
; CHECK-NEXT: %c = call i64 @test15a
|
|
|
|
two:
|
|
%y = phi i128 [%i, %entry], [%c1, %one]
|
|
%y1 = lshr i128 %y, 64
|
|
%y2 = trunc i128 %y1 to i64
|
|
%d = call i64 @test15a(i64 %y2)
|
|
%d1 = trunc i64 %d to i1
|
|
br i1 %d1, label %one, label %end
|
|
|
|
; CHECK: two:
|
|
; CHECK-NEXT: phi i64
|
|
; CHECK-NEXT: phi i64
|
|
; CHECK-NEXT: %d = call i64 @test15a
|
|
|
|
end:
|
|
%g = trunc i128 %y to i64
|
|
ret i64 %g
|
|
; CHECK: end:
|
|
; CHECK-NEXT: ret i64
|
|
}
|
|
|
|
; PR6512 - Shouldn't merge loads from different addr spaces.
|
|
define i32 @test16(i32 addrspace(1)* %pointer1, i32 %flag, i32* %pointer2)
|
|
nounwind {
|
|
entry:
|
|
%retval = alloca i32, align 4 ; <i32*> [#uses=2]
|
|
%pointer1.addr = alloca i32 addrspace(1)*, align 4 ; <i32 addrspace(1)**>
|
|
%flag.addr = alloca i32, align 4 ; <i32*> [#uses=2]
|
|
%pointer2.addr = alloca i32*, align 4 ; <i32**> [#uses=2]
|
|
%res = alloca i32, align 4 ; <i32*> [#uses=4]
|
|
store i32 addrspace(1)* %pointer1, i32 addrspace(1)** %pointer1.addr
|
|
store i32 %flag, i32* %flag.addr
|
|
store i32* %pointer2, i32** %pointer2.addr
|
|
store i32 10, i32* %res
|
|
%tmp = load i32* %flag.addr ; <i32> [#uses=1]
|
|
%tobool = icmp ne i32 %tmp, 0 ; <i1> [#uses=1]
|
|
br i1 %tobool, label %if.then, label %if.else
|
|
|
|
return: ; preds = %if.end
|
|
%tmp7 = load i32* %retval ; <i32> [#uses=1]
|
|
ret i32 %tmp7
|
|
|
|
if.end: ; preds = %if.else, %if.then
|
|
%tmp6 = load i32* %res ; <i32> [#uses=1]
|
|
store i32 %tmp6, i32* %retval
|
|
br label %return
|
|
|
|
if.then: ; preds = %entry
|
|
%tmp1 = load i32 addrspace(1)** %pointer1.addr ; <i32 addrspace(1)*>
|
|
%arrayidx = getelementptr i32 addrspace(1)* %tmp1, i32 0 ; <i32 addrspace(1)*> [#uses=1]
|
|
%tmp2 = load i32 addrspace(1)* %arrayidx ; <i32> [#uses=1]
|
|
store i32 %tmp2, i32* %res
|
|
br label %if.end
|
|
|
|
if.else: ; preds = %entry
|
|
%tmp3 = load i32** %pointer2.addr ; <i32*> [#uses=1]
|
|
%arrayidx4 = getelementptr i32* %tmp3, i32 0 ; <i32*> [#uses=1]
|
|
%tmp5 = load i32* %arrayidx4 ; <i32> [#uses=1]
|
|
store i32 %tmp5, i32* %res
|
|
br label %if.end
|
|
}
|
|
|
|
; PR4413
|
|
declare i32 @ext()
|
|
; CHECK-LABEL: @test17(
|
|
define i32 @test17(i1 %a) {
|
|
entry:
|
|
br i1 %a, label %bb1, label %bb2
|
|
|
|
bb1: ; preds = %entry
|
|
%0 = tail call i32 @ext() ; <i32> [#uses=1]
|
|
br label %bb2
|
|
|
|
bb2: ; preds = %bb1, %entry
|
|
%cond = phi i1 [ true, %bb1 ], [ false, %entry ] ; <i1> [#uses=1]
|
|
; CHECK-NOT: %val = phi i32 [ %0, %bb1 ], [ 0, %entry ]
|
|
%val = phi i32 [ %0, %bb1 ], [ 0, %entry ] ; <i32> [#uses=1]
|
|
%res = select i1 %cond, i32 %val, i32 0 ; <i32> [#uses=1]
|
|
; CHECK: ret i32 %cond
|
|
ret i32 %res
|
|
}
|
|
|
|
define i1 @test18(i1 %cond) {
|
|
%zero = alloca i32
|
|
%one = alloca i32
|
|
br i1 %cond, label %true, label %false
|
|
true:
|
|
br label %ret
|
|
false:
|
|
br label %ret
|
|
ret:
|
|
%ptr = phi i32* [ %zero, %true ] , [ %one, %false ]
|
|
%isnull = icmp eq i32* %ptr, null
|
|
ret i1 %isnull
|
|
; CHECK-LABEL: @test18(
|
|
; CHECK: ret i1 false
|
|
}
|
|
|
|
define i1 @test19(i1 %cond, double %x) {
|
|
br i1 %cond, label %true, label %false
|
|
true:
|
|
br label %ret
|
|
false:
|
|
br label %ret
|
|
ret:
|
|
%p = phi double [ %x, %true ], [ 0x7FF0000000000000, %false ]; RHS = +infty
|
|
%cmp = fcmp ule double %x, %p
|
|
ret i1 %cmp
|
|
; CHECK-LABEL: @test19(
|
|
; CHECK: ret i1 true
|
|
}
|
|
|
|
define i1 @test20(i1 %cond) {
|
|
%a = alloca i32
|
|
%b = alloca i32
|
|
%c = alloca i32
|
|
br i1 %cond, label %true, label %false
|
|
true:
|
|
br label %ret
|
|
false:
|
|
br label %ret
|
|
ret:
|
|
%p = phi i32* [ %a, %true ], [ %b, %false ]
|
|
%r = icmp eq i32* %p, %c
|
|
ret i1 %r
|
|
; CHECK-LABEL: @test20(
|
|
; CHECK: ret i1 false
|
|
}
|
|
|
|
define i1 @test21(i1 %c1, i1 %c2) {
|
|
%a = alloca i32
|
|
%b = alloca i32
|
|
%c = alloca i32
|
|
br i1 %c1, label %true, label %false
|
|
true:
|
|
br label %loop
|
|
false:
|
|
br label %loop
|
|
loop:
|
|
%p = phi i32* [ %a, %true ], [ %b, %false ], [ %p, %loop ]
|
|
%r = icmp eq i32* %p, %c
|
|
br i1 %c2, label %ret, label %loop
|
|
ret:
|
|
ret i1 %r
|
|
; CHECK-LABEL: @test21(
|
|
; CHECK: ret i1 false
|
|
}
|
|
|
|
define void @test22() {
|
|
; CHECK-LABEL: @test22(
|
|
entry:
|
|
br label %loop
|
|
loop:
|
|
%phi = phi i32 [ 0, %entry ], [ %y, %loop ]
|
|
%y = add i32 %phi, 1
|
|
%o = or i32 %y, %phi
|
|
%e = icmp eq i32 %o, %y
|
|
br i1 %e, label %loop, label %ret
|
|
; CHECK: br i1 %e
|
|
ret:
|
|
ret void
|
|
}
|
|
|
|
define i32 @test23(i32 %A, i1 %b, i32 * %P) {
|
|
BB0:
|
|
br label %Loop
|
|
|
|
Loop: ; preds = %Loop, %BB0
|
|
; PHI has same value always.
|
|
%B = phi i32 [ %A, %BB0 ], [ 42, %Loop ]
|
|
%D = add i32 %B, 19
|
|
store i32 %D, i32* %P
|
|
br i1 %b, label %Loop, label %Exit
|
|
|
|
Exit: ; preds = %Loop
|
|
%E = add i32 %B, 19
|
|
ret i32 %E
|
|
; CHECK-LABEL: @test23(
|
|
; CHECK: %phitmp = add i32 %A, 19
|
|
; CHECK: Loop:
|
|
; CHECK-NEXT: %B = phi i32 [ %phitmp, %BB0 ], [ 61, %Loop ]
|
|
; CHECK: Exit:
|
|
; CHECK-NEXT: ret i32 %B
|
|
}
|
|
|
|
define i32 @test24(i32 %A, i1 %cond) {
|
|
BB0:
|
|
%X = add nuw nsw i32 %A, 1
|
|
br i1 %cond, label %BB1, label %BB2
|
|
|
|
BB1:
|
|
%Y = add nuw i32 %A, 1
|
|
br label %BB2
|
|
|
|
BB2:
|
|
%C = phi i32 [ %X, %BB0 ], [ %Y, %BB1 ]
|
|
ret i32 %C
|
|
; CHECK-LABEL: @test24(
|
|
; CHECK-NOT: phi
|
|
; CHECK: BB2:
|
|
; CHECK-NEXT: %C = add nuw i32 %A, 1
|
|
; CHECK-NEXT: ret i32 %C
|
|
}
|
|
|
|
; Same as test11, but used to be missed due to a bug.
|
|
declare i1 @test25a()
|
|
|
|
define i1 @test25() {
|
|
entry:
|
|
%a = alloca i32
|
|
%i = ptrtoint i32* %a to i64
|
|
%b = call i1 @test25a()
|
|
br i1 %b, label %one, label %two
|
|
|
|
one:
|
|
%x = phi i64 [%y, %two], [%i, %entry]
|
|
%c = call i1 @test25a()
|
|
br i1 %c, label %two, label %end
|
|
|
|
two:
|
|
%y = phi i64 [%x, %one], [%i, %entry]
|
|
%d = call i1 @test25a()
|
|
br i1 %d, label %one, label %end
|
|
|
|
end:
|
|
%f = phi i64 [ %x, %one], [%y, %two]
|
|
; Change the %f to %i, and the optimizer suddenly becomes a lot smarter
|
|
; even though %f must equal %i at this point
|
|
%g = inttoptr i64 %f to i32*
|
|
store i32 10, i32* %g
|
|
%z = call i1 @test25a()
|
|
ret i1 %z
|
|
; CHECK-LABEL: @test25(
|
|
; CHECK-NOT: phi i32
|
|
; CHECK: ret i1 %z
|
|
}
|
|
|
|
declare i1 @test26a()
|
|
|
|
define i1 @test26(i32 %n) {
|
|
entry:
|
|
%a = alloca i32
|
|
%i = ptrtoint i32* %a to i64
|
|
%b = call i1 @test26a()
|
|
br label %one
|
|
|
|
one:
|
|
%x = phi i64 [%y, %two], [%w, %three], [%i, %entry]
|
|
%c = call i1 @test26a()
|
|
switch i32 %n, label %end [
|
|
i32 2, label %two
|
|
i32 3, label %three
|
|
]
|
|
|
|
two:
|
|
%y = phi i64 [%x, %one], [%w, %three]
|
|
%d = call i1 @test26a()
|
|
switch i32 %n, label %end [
|
|
i32 10, label %one
|
|
i32 30, label %three
|
|
]
|
|
|
|
three:
|
|
%w = phi i64 [%y, %two], [%x, %one]
|
|
%e = call i1 @test26a()
|
|
br i1 %e, label %one, label %two
|
|
|
|
end:
|
|
%f = phi i64 [ %x, %one], [%y, %two]
|
|
; Change the %f to %i, and the optimizer suddenly becomes a lot smarter
|
|
; even though %f must equal %i at this point
|
|
%g = inttoptr i64 %f to i32*
|
|
store i32 10, i32* %g
|
|
%z = call i1 @test26a()
|
|
ret i1 %z
|
|
; CHECK-LABEL: @test26(
|
|
; CHECK-NOT: phi i32
|
|
; CHECK: ret i1 %z
|
|
}
|
|
|
|
; CHECK-LABEL: @test27(
|
|
; CHECK: ret i32 undef
|
|
define i32 @test27(i1 %b) {
|
|
entry:
|
|
br label %done
|
|
done:
|
|
%y = phi i32 [ undef, %entry ]
|
|
ret i32 %y
|
|
}
|