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https://github.com/c64scene-ar/llvm-6502.git
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43b54db2a4
When predicting use-list order, we visit functions in reverse order
followed by `GlobalValue`s and write out use-lists at the first
opportunity. In the reader, this will translate to *after* the last use
has been added.
For this to work, we actually need to descend into `GlobalValue`s.
Added a targeted test in `use-list-order.ll` and `RUN` lines to the
newly passing tests in `test/Bitcode`.
There are two remaining failures in `test/Bitcode`:
- blockaddress.ll: I haven't thought through how to model the way
block addresses change the order of use-lists (or how to work around
it).
- metadata-2.ll: There's an old-style `@llvm.used` global array here
that I suspect the .ll parser isn't upgrading properly. When it
round-trips through bitcode, the .bc reader *does* upgrade it, so
the extra variable (`i8* null`) has an extra use, and the shuffle
vector doesn't match.
I think the fix is to upgrade old-style global arrays (or reject
them?) in the .ll parser.
This is part of PR5680.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214321 91177308-0d34-0410-b5e6-96231b3b80d8
108 lines
1.9 KiB
LLVM
108 lines
1.9 KiB
LLVM
; RUN: verify-uselistorder < %s -preserve-bc-use-list-order -num-shuffles=5
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@a = global [4 x i1] [i1 0, i1 1, i1 0, i1 1]
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@b = alias i1* getelementptr ([4 x i1]* @a, i64 0, i64 2)
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; Check use-list order of constants used by globals.
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@glob1 = global i5 7
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@glob2 = global i5 7
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@glob3 = global i5 7
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; Check use-list order between variables and aliases.
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@target = global i3 zeroinitializer
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@alias1 = alias i3* @target
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@alias2 = alias i3* @target
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@alias3 = alias i3* @target
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@var1 = global i3* @target
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@var2 = global i3* @target
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@var3 = global i3* @target
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; Check use-list order for a global when used both by a global and in a
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; function.
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@globalAndFunction = global i4 4
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@globalAndFunctionGlobalUser = global i4* @globalAndFunction
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define i64 @f(i64 %f) {
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entry:
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%sum = add i64 %f, 0
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ret i64 %sum
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}
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define i64 @g(i64 %g) {
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entry:
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%sum = add i64 %g, 0
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ret i64 %sum
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}
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define i64 @h(i64 %h) {
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entry:
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%sum = add i64 %h, 0
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ret i64 %sum
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}
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define i64 @i(i64 %i) {
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entry:
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%sum = add i64 %i, 1
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ret i64 %sum
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}
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define i64 @j(i64 %j) {
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entry:
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%sum = add i64 %j, 1
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ret i64 %sum
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}
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define i64 @k(i64 %k) {
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entry:
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%sum = add i64 %k, 1
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ret i64 %sum
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}
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define i64 @l(i64 %l) {
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entry:
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%sum = add i64 %l, 1
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ret i64 %sum
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}
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define i1 @loadb() {
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entry:
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%b = load i1* @b
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ret i1 %b
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}
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define i1 @loada() {
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entry:
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%a = load i1* getelementptr ([4 x i1]* @a, i64 0, i64 2)
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ret i1 %a
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}
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define i32 @f32(i32 %a, i32 %b, i32 %c, i32 %d) {
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entry:
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br label %first
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second:
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%eh = mul i32 %e, %h
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%sum = add i32 %eh, %ef
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br label %exit
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exit:
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%product = phi i32 [%ef, %first], [%sum, %second]
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ret i32 %product
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first:
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%e = add i32 %a, 7
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%f = add i32 %b, 7
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%g = add i32 %c, 8
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%h = add i32 %d, 8
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%ef = mul i32 %e, %f
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%gh = mul i32 %g, %h
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%gotosecond = icmp slt i32 %gh, -9
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br i1 %gotosecond, label %second, label %exit
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}
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define i4 @globalAndFunctionFunctionUser() {
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entry:
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%local = load i4* @globalAndFunction
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ret i4 %local
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}
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