define i32* @test8({ i32, i32 } *%A, i1 %b) {
BB0:
- %X = getelementptr { i32, i32 } *%A, i32 0, i32 1
+ %X = getelementptr inbounds { i32, i32 } *%A, i32 0, i32 1
br i1 %b, label %BB1, label %BB2
BB1:
; CHECK: @test8
; CHECK-NOT: phi
; CHECK: BB2:
-; CHECK-NEXT: %B = getelementptr
+; CHECK-NEXT: %B = getelementptr { i32, i32 }* %A
; CHECK-NEXT: ret i32* %B
}
define i1 @test11() {
entry:
%a = alloca i32
- %i = ptrtoint i32* %a to i32
+ %i = ptrtoint i32* %a to i64
%b = call i1 @test11a()
br i1 %b, label %one, label %two
one:
- %x = phi i32 [%i, %entry], [%y, %two]
+ %x = phi i64 [%i, %entry], [%y, %two]
%c = call i1 @test11a()
br i1 %c, label %two, label %end
two:
- %y = phi i32 [%i, %entry], [%x, %one]
+ %y = phi i64 [%i, %entry], [%x, %one]
%d = call i1 @test11a()
br i1 %d, label %one, label %end
end:
- %f = phi i32 [ %x, %one], [%y, %two]
+ %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 i32 %f to i32*
+ %g = inttoptr i64 %f to i32*
store i32 10, i32* %g
%z = call i1 @test11a()
ret i1 %z
; 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: @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: @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: @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: @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: @test21
+; CHECK: ret i1 false
+}
+
+define void @test22() {
+; CHECK: @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: @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: @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: @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: @test26
+; CHECK-NOT: phi i32
+; CHECK: ret i1 %z
+}
+
+; CHECK: @test27(
+; CHECK: ret i32 undef
+define i32 @test27(i1 %b) {
+entry:
+ br label %done
+done:
+ %y = phi i32 [ undef, %entry ]
+ ret i32 %y
+}
projects / oota-llvm.git / blobdiff